color

color

col·or

C0488500 (kŭl′ər)n.1. That aspect of things that is caused by differing qualities of the light reflected or emitted by them, definable in terms of the observer or of the light, as:a. The appearance of objects or light sources described in terms of the individual's perception of them, involving hue, lightness, and saturation for objects, and hue, brightness, and saturation for light sources.b. The characteristics of light by which the individual is made aware of objects or light sources through the receptors of the eye, described in terms of dominant wavelength, luminance, and purity.c. A gradation or variation of this aspect, especially when other than black, white, or gray; a hue: fireworks that exploded in brilliant colors.2. A substance, such as a dye, pigment, or paint, that imparts a hue.3. a. The use of different colors in visual representation.b. The different colors used in visual representation: one of the earliest movies in color.4. a. The general appearance of the skin, especially as an indication of good health: regained her color after a few days' rest.b. A reddening of the face, as a blush or sign of anger.5. Skin pigmentation considered as a racial characteristic or a marker of racial identity, especially when other than white: "My father told me if I go west, there's integration; you don't worry about color" (Itabari Njeri). See Usage Note at person of color.6. colorsa. A colored item, such as a badge, ribbon, or piece of clothing, serving as an identifying mark: wore the colors of their college.b. A flag or banner, as of a country or military unit: a ship flying the colors of Brazil.c. The salute made during the ceremony of raising or lowering a flag.7. colors One's opinion or position: Stick to your colors.8. often colors Character or nature: revealed their true colors.9. a. An outward and often deceptive appearance: a tale with the merest color of truth.b. Appearance of authenticity: testimony that lends color to an otherwise absurd notion.c. Law The appearance of a legal claim, as to a right or office.10. a. Vividness or variety in expression: a story told with a lot of color.b. Commentary distinguished by vivid details or background information, as during a sports broadcast: A former coach provided the color for the championship game.11. Local color.12. The use or effect of pigment in painting, as distinct from form.13. Music Quality of tone or timbre.14. A particle or bit of gold found in auriferous gravel or sand.15. Physics See color charge.16. Astronomy See color index.v. col·ored, col·or·ing, col·ors v.tr.1. To impart color to or change the color of.2. a. To give a distinctive character or quality to; modify: "Both books are colored by the author's childhood experiences" (Deborah M. Locke).b. To exert an influence on; affect: The war colored the soldier's life.3. a. To misrepresent, especially by distortion or exaggeration: color the facts.b. To gloss over; excuse: a parent who colored the children's lies.v.intr.1. a. To take on color.b. To change color.2. To become red in the face; redden or blush.

[Middle English colour, from Old French, from Latin color; see kel- in Indo-European roots.]

col′or·er n.

color

(ˈkʌlə) n, vb the US spelling of colour ˈcolorable adj ˈcolorer n ˈcolorful adj ˈcoloring n ˈcolorist n ˈcolorless adj

col•or

(ˈkʌl ər)

n. 1. the quality of an object or substance with respect to light reflected by it, usu. determined visually by measurement of hue, saturation, and brightness of the reflected light; saturation or chroma; hue. 2. the natural hue of the skin, esp. of the face; complexion. 3. a ruddy complexion, usu. indicating good health. 4. a blush. 5. vivid or distinctive quality, as of a literary work. 6. details in description, customs, speech, habits, etc., of a place or period: a novel about the Pilgrims with much local color. 7. something that is used for coloring; pigment; dye. 8. background information, as anecdotes or analyses of strategy, given by a sportscaster during a broadcast. 9. colors, a. a colored badge, ribbon, or uniform worn or displayed to signify allegiance, membership, etc. b. viewpoint or attitude; character; personality: to show one's true colors under stress. c. a flag, ensign, etc., particularly the national flag. 10. skin tone other than white as an indicator of racial or ethnic affiliation: Persons of color had been denied their civil rights. 11. outward appearance or aspect; guise or show: a lie that had the color of truth. 12. a pretext: a mean trick under the color of a good deed. 13. Law. an apparent or evident right: holding possession under color of title. 14. tonal shading and timbre in music. 15. a trace or particle of valuable mineral, esp. gold, as shown by washing auriferous gravel. 16. Physics. a theoretical property that distinguishes the various states in which quarks exist. adj. 17. involving, utilizing, yielding, or possessing color: a color TV. v.t. 18. to give or apply color to; tinge; paint; dye. 19. to cause to appear different from the reality: She colored her account. 20. to give a special character or quality to: The author's animosities color his writing. v.i. 21. to take on or change color. 22. to flush; blush. Idioms: change color, a. to blush. b. to turn pale. [1250–1300; Middle English col(e)ur < Anglo-French < Latin colōrem, acc. of color] col′or•er, n. usage: See -or¹.

col·or

(kŭl′ər) The sensation produced by the effect of light waves striking the retina of the eye. The color of something depends mainly on which wavelengths of light it emits, reflects, or transmits.

Color

achromaticity1. the total absence of color.
2. the ability to emit, reflect, or transmit light without breaking down into separate colors. Also achromatism.achromatopsy, achromatopsiacolor blindness. Also called acritochromacy.acyanoblepsiaa variety of color blindness characterized by an inability to distinguish blue.albescencethe condition of being or becoming white or whitish. — albescent, adj.albicationthe process of turning white or whitish.chatoyancythe condition or quality of changing in color or luster depending on the angle of light, exhibited especially by a gemstone that reflects a single shaft of light when cut in cabochon form. — chatoyant, adj.chromaticsthe branch of opties that studies the properties of colors.chromatism1. Opties, dispersion or distortion of color.
2. abnormal coloration. See also botany.chromatologythe study of colors. Also called chromatography.chromatropean instrument consisting of an arrangement of colored dises which, when rotated rapidly, give the impression of colors flowing to or from the center.chromophobiaan abnormal fear of colors.chromoptometera device for measuring the degree of a person’s sense of color.chromotypography, chromotypythe process of color printing.colorimetrythe measurement of the physical intensity of colors, as opposed to their subjective brightness. — colorimeter, n. — colorimetric, colorimetrical, adj.cyanometrythe measurement of the intensity of the sky’s blue color. — cyanometer, n. — cyanometric, adj.Daltonismred-green color blindness.deuteranopiaa defect of the eyesight in which the retina does not respond to green. — deuteranope, n. — deuteranopic, adj.dichroisma property, peculiar to certain crystals, of reflecting light in two different colors when viewed from two different directions. — dichroic, adj.dichromatism1. the quality of being dichromatic, or having two colors.
2. a form of color blindness in which the sufferer can perceive only two of the three primary colors and their variants. — dichromatic, adj.dyschromatopsiadifficulty in telling colors apart; color blindness.erythrophobiaan abnormal fear of the color red.floriditythe condition of being florid or highly colored, especially reddish, used especially of the complexion. — florid, adj.glaucescence1. the state or quality of being a silvery or bluish green in color.
2. the process of turning this color. — glaucescent, adj.hyperchromatismthe occurrence of unusually intense coloration. — hyperchromatic, adj.indigometeran instrument used for determining the strength of an indigo solution.indigometrythe practice and art of determining the strength and coloring power of an indigo solution.iridescencethe state or condition of being colored like a rainbow or like the light shining through a prism. — iridescent, adj.irisationthe process of making or becoming iridescent.iriscopea polished black glass, the surface of which becomes iridescent when it is breathed upon through a tube.melanoscopean optical device composed of red and violet glass that transmits red light only, used for distinguishing red in varicolored flames.metachromatismchange in color, especially as a result of change in temperature.monochromatism1. the quality of being of only one color or in only one color, as a work of art.
2. a defect of eyesight in which the retina cannot perceive color. — monochromatic, adj.mordancy, mordacitythe property of acting as a flxative in dyeing. — mordant, n., adj.opalescencethe quality of being opallike, or milkily iridescent. — opalescent, adj.palliditya faintness or deficiency in color. — pallid, adj.panchromatismthe quality or condition of being lsensitive to all colors, as certain types of photographic film. — panchromatic, adj.polychromatismthe state or quality of being multicolored. — polychromatic, polychromie, adj.protanopiaa defect of the eyesight in which the retina does not respond to red. — protanope, n. — protanopic, adj.rubescence1. the state, condition, quality, or process of becoming or being red.
2. a blush.
3. the act of blushing. — rubescent, adj.rufescence1. the tendency to turn red or reddish.
2. reddishness. — rufescent, adj.spectrograma photograph of a spectrum. Also called spectrograph.spectrograph1. an optical device for breaking light down into a spectrum and recording the results photographically.
2. a spectrogram. — spectrographic, adj.spectrographythe technique of using a spectrograph and producing spectrograms.trichroisma property, peculiar to certain crystals, of transmitting light of three different colors when viewed from three different directions. Also trichromatism. — trichroic, adj.trichromatism1. the condition of having, using, or combining three colors.
2. trichroism. — trichromatic, adj.tritanopiaa defect of the eyesight in which the retina does not respond to blue and yellow. — tritanope, n. — tritanopic, adj.verdancythe quality or condition of being green, as the condition of being covered with green plants or grass or inexperience attributable to youth. — verdant, adj.viridescence1. the state or quality of being green or greenish.
2. greenishness. — viridescent, adj.xanthocyanopsy, xanthocyanopya form of color blindness in which only yellow and blue can be perceived.

color

Past participle: colored
Gerund: coloring

Imperative
color
color

Present
I color
you color
he/she/it colors
we color
you color
they color

Preterite
I colored
you colored
he/she/it colored
we colored
you colored
they colored

Present Continuous
I am coloring
you are coloring
he/she/it is coloring
we are coloring
you are coloring
they are coloring

Present Perfect
I have colored
you have colored
he/she/it has colored
we have colored
you have colored
they have colored

Past Continuous
I was coloring
you were coloring
he/she/it was coloring
we were coloring
you were coloring
they were coloring

Past Perfect
I had colored
you had colored
he/she/it had colored
we had colored
you had colored
they had colored

Future
I will color
you will color
he/she/it will color
we will color
you will color
they will color

Future Perfect
I will have colored
you will have colored
he/she/it will have colored
we will have colored
you will have colored
they will have colored

Future Continuous
I will be coloring
you will be coloring
he/she/it will be coloring
we will be coloring
you will be coloring
they will be coloring

Present Perfect Continuous
I have been coloring
you have been coloring
he/she/it has been coloring
we have been coloring
you have been coloring
they have been coloring

Future Perfect Continuous
I will have been coloring
you will have been coloring
he/she/it will have been coloring
we will have been coloring
you will have been coloring
they will have been coloring

Past Perfect Continuous
I had been coloring
you had been coloring
he/she/it had been coloring
we had been coloring
you had been coloring
they had been coloring

Conditional
I would color
you would color
he/she/it would color
we would color
you would color
they would color

Past Conditional
I would have colored
you would have colored
he/she/it would have colored
we would have colored
you would have colored
they would have colored

Thesaurus

Noun	1.	color - a visual attribute of things that results from the light they emit or transmit or reflect; "a white color is made up of many different wavelengths of light"coloring, colouring, colourvisual property - an attribute of visionprimary color, primary colour - any of three colors from which all others can be obtained by mixingheather mixture, heather - interwoven yarns of mixed colors producing muted greyish shades with flecks of colormottle - an irregular arrangement of patches of color; "it was not dull grey as distance had suggested, but a mottle of khaki and black and olive-green"tint, shade, tincture, tone - a quality of a given color that differs slightly from another color; "after several trials he mixed the shade of pink that she wanted"chromatic color, chromatic colour, spectral color, spectral colour - a color that has hueachromatic color, achromatic colour - a color lacking hue; white or grey or blackcoloration, colouration - appearance with regard to color; "her healthy coloration"complexion, skin color, skin colour - the coloring of a person's facedithered color, dithered colour, nonsolid color, nonsolid colour - a color produced by a pattern of differently colored dots that together simulate the desired colorachromaticity, achromatism, colorlessness, colourlessness - the visual property of being without chromatic color
	2.	color - interest and variety and intensity; "the Puritan Period was lacking in color"; "the characters were delineated with exceptional vividness"vividness, colourinterestingness, interest - the power of attracting or holding one's attention (because it is unusual or exciting etc.); "they said nothing of great interest"; "primary colors can add interest to a room"
	3.	color - the timbre of a musical sound; "the recording fails to capture the true color of the original music"coloration, colouration, colourtimbre, tone, quality, timber - (music) the distinctive property of a complex sound (a voice or noise or musical sound); "the timbre of her soprano was rich and lovely"; "the muffled tones of the broken bell summoned them to meet"
	4.	color - a race with skin pigmentation different from the white race (especially Blacks)people of color, people of colour, colourrace - people who are believed to belong to the same genetic stock; "some biologists doubt that there are important genetic differences between races of human beings"person of color, person of colour - (formal) any non-European non-white person
	5.	color - an outward or token appearance or form that is deliberately misleading; "he hoped his claims would have a semblance of authenticity"; "he tried to give his falsehood the gloss of moral sanction"; "the situation soon took on a different color"semblance, gloss, colourappearance, visual aspect - outward or visible aspect of a person or thingcolor of law, colour of law - a mere semblance of legal right; something done with the apparent authority of law but actually in contravention of law; "the plaintiff claimed that under color of law the officer had deprived him of his civil rights"simulacrum - an insubstantial or vague semblanceface value - the apparent worth as opposed to the real worthguise, pretence, pretext, pretense - an artful or simulated semblance; "under the guise of friendship he betrayed them"camouflage, disguise - an outward semblance that misrepresents the true nature of something; "the theatrical notion of disguise is always associated with catastrophe in his stories"verisimilitude - the appearance of truth; the quality of seeming to be true
	6.	color - any material used for its color; "she used a different color for the trim"coloring material, colour, colouring materialpaint, pigment - a substance used as a coating to protect or decorate a surface (especially a mixture of pigment suspended in a liquid); dries to form a hard coating; "artists use `paint' and `pigment' interchangeably"material, stuff - the tangible substance that goes into the makeup of a physical object; "coal is a hard black material"; "wheat is the stuff they use to make bread"indicator - (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reactionmordant - a substance used to treat leather or other materials before dyeing; aids in dyeing processdye, dyestuff - a usually soluble substance for staining or coloring e.g. fabrics or hairtincture - a substances that colors metalshematochrome - a reddish coloring material found in some algaepigment - dry coloring material (especially a powder to be mixed with a liquid to produce paint, etc.)pigment - any substance whose presence in plant or animal tissues produces a characteristic colorstain - (microscopy) a dye or other coloring material that is used in microscopy to make structures visible
	7.	color - (physics) the characteristic of quarks that determines their role in the strong interaction; "each flavor of quarks comes in three colors"colourkind, sort, form, variety - a category of things distinguished by some common characteristic or quality; "sculpture is a form of art"; "what kinds of desserts are there?"high energy physics, high-energy physics, particle physics - the branch of physics that studies subatomic particles and their interactions
	8.	color - the appearance of objects (or light sources) described in terms of a person's perception of their hue and lightness (or brightness) and saturationcolourappearance, visual aspect - outward or visible aspect of a person or thing
Verb	1.	color - add color to; "The child colored the drawings"; "Fall colored the trees"; "colorize black and white film"color in, colorise, colorize, colour in, colourise, colourize, colouralter, change, modify - cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"blackwash - color with blackwashparti-color, motley - make motley; color with different colorspolychrome, polychromise, polychromize - color with many colors; make polychromeazure - color azure; "Morning azured the village"empurple, purpurate, purple - color purpleaurify - turn goldenverdigris - color verdigrispinkify - make pinkincarnadine - make flesh-coloredbrown, embrown - make brown in color; "the draught browned the leaves on the trees in the yard"handcolor, handcolour - color by hand; "Some old photographs are handcolored"tinct, tint, tinge, touch - color lightly; "her greying hair was tinged blond"; "the leaves were tinged red in November"pigment - color or dye with a pigment; "pigment a photograph"hue, imbue - suffuse with colorretouch - give retouches to (hair); "retouch the roots"silver - make silver in color; "Her worries had silvered her hair"gray, grey - make grey; "The painter decided to grey the sky"tone - change to a color image; "tone a photographic image"redden - make red; "The setting sun reddened the sky"blotch, mottle, streak - mark with spots or blotches of different color or shades of color as if staineddiscolor - lose color or turn colorless; "The painting discolored"
	2.	color - affect as in thought or feeling; "My personal feelings color my judgment in this case"; "The sadness tinged his life"tinge, colour, distortaffect, bear upon, impact, bear on, touch on, touch - have an effect upon; "Will the new rules affect me?"
	3.	color - modify or bias; "His political ideas color his lectures"colouract upon, influence, work - have and exert influence or effect; "The artist's work influenced the young painter"; "She worked on her friends to support the political candidate"
	4.	color - decorate with colors; "color the walls with paint in warm tones"emblazon, colouradorn, decorate, grace, ornament, embellish, beautify - make more attractive by adding ornament, colour, etc.; "Decorate the room for the party"; "beautify yourself for the special day"miniate - paint with red lead or vermilion
	5.	color - give a deceptive explanation or excuse for; "color a lie"colour, glossapologise, rationalize, apologize, rationalise, justify, excuse - defend, explain, clear away, or make excuses for by reasoning; "rationalize the child's seemingly crazy behavior"; "he rationalized his lack of success"
	6.	color - change color, often in an undesired manner; "The shirts discolored"discolour, discolor, colourblush, crimson, flush, redden - turn red, as if in embarrassment or shame; "The girl blushed when a young man whistled as she walked by"blanch, blench, pale - turn pale, as if in fearbronze, tan - get a tan, from wind or sunsunburn, burn - get a sunburn by overexposure to the sunchange - undergo a change; become different in essence; losing one's or its original nature; "She changed completely as she grew older"; "The weather changed last night"white, whiten - turn white; "This detergent will whiten your laundry"black, blacken, nigrify, melanise, melanize - make or become black; "The smoke blackened the ceiling"; "The ceiling blackened"turn - change color; "In Vermont, the leaves turn early"silver - turn silver; "The man's hair silvered very attractively"dye - color with dye; "Please dye these shoes"redden - turn red or redder; "The sky reddened"purple - become purplegray, grey - turn grey; "Her hair began to grey"yellow - turn yellow; "The pages of the book began to yellow"tone - change the color or tone of; "tone a negative"green - turn or become green; "The trees are greening"blue - turn blue
Adj.	1.	color - having or capable of producing colors; "color film"; "he rented a color television"; "marvelous color illustrations"colourphotography, picture taking - the act of taking and printing photographsblack and white, black-and-white - not having or not capable of producing colors; "black-and-white film"; "a black-and-white TV"; "the movie was in black and white"black and white, black-and-white - not having or not capable of producing colors; "black-and-white film"; "a black-and-white TV"; "the movie was in black and white"

color

noun1. The property by which the sense of vision can distinguish between objects, as a red apple and a green apple, that are very similar or identical in form and size:hue, shade, tint, tone.2. Something that imparts color:colorant, coloring, dye, dyestuff, pigment, stain, tincture.3. Skin tone, especially of the face:coloring, complexion.4. A fresh rosy complexion:bloom, blush, flush, glow.5. Fabric used especially as a symbol.Used in plural:banderole, banner, banneret, ensign, flag, jack, oriflamme, pennant, pennon, standard, streamer.6. A deceptive outward appearance:cloak, coloring, cover, disguise, disguisement, façade, face, false colors, front, gloss, guise, mask, masquerade, pretense, pretext, semblance, show, veil, veneer, window-dressing.Slang: put-on.7. Appearance of truth or authenticity:believability, credibility, credibleness, creditability, creditableness, plausibility, plausibleness, verisimilitude.verb1. To impart color to:dye, stain, tincture, tint.2. To immerse in a coloring solution:dip, dye.3. To become red in the face:blush, crimson, flush, glow, mantle, redden.4. To give an inaccurate view of by representing falsely or misleadingly:belie, distort, falsify, load, misrepresent, misstate, pervert, twist, warp, wrench, wrest.Idiom: give a false coloring to.5. To give a deceptively attractive appearance to:gild, gloss (over), gloze (over), sugarcoat, varnish, veneer, whitewash.Idioms: paper over, put a good face on.

Translations

颜色

colour

(American) color (ˈkalə) noun1. a quality which objects have, and which can be seen, only when light falls on them. What colour is her dress?; Red, blue and yellow are colours.颜色2. paint(s). That artist uses water-colours.颜料3. (a) skin-colour varying with race. people of all colours.肤色4. vividness; interest. There's plenty of colour in his stories. 多彩多姿，独特风格 adjective (of photographs etc) in colour, not black and white. colour film; colour television.彩色的 verb to put colour on; to paint. They coloured the walls yellow.给...着色ˈcoloured adjective1. having colour. She prefers white baths to coloured baths.有色的2. belonging to a dark-skinned race. There are only two white families living in this street – the rest are coloured.有色人种的 noun (sometimes used impolitely) a dark-skinned person especially of Negro origin. 有色人种（尤指黑人） ˈcolourful adjective1. full of colour. a colourful pattern.色彩丰富的2. vivid and interesting. a colourful account of his experiences.丰富多彩的ˈcolouring noun1. something used to give colour. She put pink colouring in the icing.着色2. complexion. She had very high colouring (= a very pink complexion).面色ˈcolourless adjective1. without colour. Water is colourless.无色的2. not lively or interesting. a colourless young woman. 无趣的，无特色的 ˈcolours noun plural1. the distinction of winning a place in the team in some sports. He won his cricket colours last season.被选入运动队2. a flag. Army regiments salute the colours when on parade.旗帜3. a tunic of certain colours worn by a jockey to show that his race-horse belongs to a certain person. （表示所属某人色彩标志的）衣帽 ˈcolour-blind adjective unable to tell the difference between certain colours. As he was colour-blind he could not distinguish between red and green.色盲的ˈcolour scheme noun an arrangement or choice of colours in decorating a house etc. （室内装饰的）色彩设计 ˌoff-ˈcolour adjective not feeling well. He was a bit off-colour the morning after the party.身体不适的colour in to put colour into (drawings etc). He coloured in all the oblong shapes on the page.上色show oneself in one's true colours to show or express one's real character, opinion etc. He pretends to be very generous but he showed himself in his true colours when he refused to give money to charity.现出本性with flying colours with great success. He passed his exam with flying colours.大为成功

color

→ 颜色zhCN

Do you have this in another color? (US)
Do you have this in another colour? (UK) → 有其它颜色的吗？
I don't like the color (US)
I don't like the colour (UK) → 我不喜欢这种颜色
A color film, please (US)
A colour film, please (UK) → 我要一卷彩色胶卷
I need a color film for this camera (US)
I need a colour film for this camera (UK) → 我要一卷这台相机用的彩色胶卷
Is there a color printer? (US)
Is there a colour printer? (UK) → 有彩色打印机吗？
In color (US)
In colour (UK) → 彩色的
I'd like a color photocopy of this, please (US)
I'd like a colour photocopy of this, please (UK) → 请帮我复印一份彩色的
Could you color my hair, please? (US)
Can you dye my hair, please? (UK) → 请给我把头发染一染吧
Could you color my roots, please? (US)
Can you dye my roots, please? (UK) → 请把我的头发根染一染吧
This color, please (US)
This colour, please (UK) → 要这种颜色

color

color,

effect produced on the eye and its associated nerves by light waves of different wavelength or frequency. Light transmitted from an object to the eye stimulates the different color cones of the retina, thus making possible perception of various colors in the object.

See also lightlight,
visible electromagnetic radiation. Of the entire electromagnetic spectrum, the human eye is sensitive to only a tiny part, the part that is called light. The wavelengths of visible light range from about 350 or 400 nm to about 750 or 800 nm.
..... Click the link for more information. ; paintingpainting,
direct application of pigment to a surface to produce by tones of color or of light and dark some representation or decorative arrangement of natural or imagined forms.

See also articles on individual painters, e.g., Rubens; countries, e.g.
..... Click the link for more information. ; protective colorationprotective coloration,
coloration or color pattern of an animal that affords it protection from observation either by its predators or by its prey. The most widespread form of protective coloration is called cryptic resemblance, in which various effects that supplement the
..... Click the link for more information. ; visionvision,
physiological sense of sight by which the form, color, size, movements, and distance of objects are perceived. Vision in Humans

The human eye functions somewhat like a camera; that is, it receives and focuses light upon a photosensitive receiver, the retina.
..... Click the link for more information. .

The Visible Spectrum

Since the colors that compose sunlight or white light have different wavelengths, the speed at which they travel through a medium such as glass differs; red light, having the longest wavelength, travels more rapidly through glass than blue light, which has a shorter wavelength. Therefore, when white light passes through a glass prismprism,
in optics, a piece of translucent glass or crystal used to form a spectrum of light separated according to colors. Its cross section is usually triangular. The light becomes separated because different wavelengths or frequencies are refracted (bent) by different amounts
..... Click the link for more information. , it is separated into a band of colors called a spectrumspectrum,
arrangement or display of light or other form of radiation separated according to wavelength, frequency, energy, or some other property. Beams of charged particles can be separated into a spectrum according to mass in a mass spectrometer (see mass spectrograph).
..... Click the link for more information. . The colors of the visible spectrum, called the elementary colors, are red, orange, yellow, green, blue, indigo, and violet (in that order).

Apparent Color of Objects

Color is a property of light that depends on wavelength. When light falls on an object, some of it is absorbed and some is reflected. The apparent color of an opaque object depends on the wavelength of the light that it reflects; e.g., a red object observed in daylight appears red because it reflects only the waves producing red light. The color of a transparent object is determined by the wavelength of the light transmitted by it. An opaque object that reflects all wavelengths appears white; one that absorbs all wavelengths appears black. Black and white are not generally considered true colors; black is said to result from the absence of color, and white from the presence of all colors mixed together.

Additive Colors

Colors whose beams of light in various combinations can produce any of the color sensations are called primary, or spectral, colors. The process of combining these colors is said to be "additive"; i.e., the sensations produced by different wavelengths of light are added together. The additive primaries are red, green, and blue-violet. White can be produced by combining all three primary colors. Any two colors whose light together produces white are called complementary colors, e.g., yellow and blue-violet, or red and blue-green.

Subtractive Colors

When pigments are mixed, the resulting sensations differ from those of the transmitted primary colors. The process in this case is "subtractive," since the pigments subtract or absorb some of the wavelengths of light. Magenta (red-violet), yellow, and cyan (blue-green) are called subtractive primaries, or primary pigments. A mixture of blue and yellow pigments yields green, the only color not absorbed by one pigment or the other. A mixture of the three primary pigments produces black.

Properties of Colors

The scientific description of color, or colorimetry, involves the specification of all relevant properties of a color either subjectively or objectively. The subjective description gives the hue, saturation, and lightness or brightness of a color. Hue refers to what is commonly called color, i.e., red, green, blue-green, orange, etc. Saturation refers to the richness of a hue as compared to a gray of the same brightness; in some color notation systems, saturation is also known as chroma. The brightness of a light source or the lightness of an opaque object is measured on a scale ranging from dim to bright for a source or from black to white for an opaque object (or from black to colorless for a transparent object). In some systems, brightness is called value. A subjective color notation system provides comparison samples of colors rated according to these three properties. In an objective system for color description, the corresponding properties are dominant wavelength, purity, and luminance. Much of the research in objective color description has been carried out in cooperation with the Commission Internationale de l'Eclairage (CIE), which has set standards for such measurements. In addition to the description of color according to these physical and psychological standards, a number of color-related physiological and psychological phenomena have been studied. These include color constancy under varying viewing conditions, color contrast, afterimages, and advancing and retreating colors.

Symbolic Uses of Color

Color has long been used to represent affiliations and loyalties (e.g., school or regimental colors) and as a symbol of various moods (e.g., red with rage) and qualities (e.g., worthy of a blue ribbon). A well-known use of the symbolism of color is in the liturgical colors of the Western Church, according to which the color of the vestments varies through the ecclesiastical calendar; e.g., purple (i.e., violet) is the color of Advent and Lent; white, of Easter; and red, of the feasts of the martyrs.

Bibliography

See G. Wyszecki and W. S. Stiles, Color Science (1967); M. W. Levine and J. M. Shefner, Fundamentals of Sensation and Perception (1991).

Color

That aspect of visual sensation enabling a human observer to distinguish differences between two structure-free fields of light having the same size, shape, and duration. Although luminance differences alone permit such discriminations to be made, the term color is usually restricted to a class of differences still perceived at equal luminance. These depend upon physical differences in the spectral compositions of the two fields, usually revealed to the observer as differences of hue or saturation.

Color discriminations are possible because the human eye contains three classes of cone photoreceptors that differ in the photopigments they contain and in their neural connections. Two of these, the R and G cones, are sensitive to all wavelengths of the visible spectrum from 380 to 700 nanometers. (Even longer or shorter wavelengths may be effective if sufficient energy is available.) R cones are maximally sensitive at about 570 nm, G cones at about 540 nm. The ratio R/G of cone sensitivities is minimal at 465 nm and increases monotonically for wavelengths both shorter and longer than this. This ratio is independent of intensity, and the red-green dimension of color variation is encoded in terms of it. The B cones, whose sensitivity peaks at about 440 nm, are not appreciably excited by wavelengths longer than 540 nm. The perception of blueness and yellowness depends upon the level of excitation of B cones in relation to that of R and G cones. No two wavelengths of light can produce equal excitations in all three kinds of cones. It follows that, provided they are sufficiently different to be discriminable, no two wavelengths can give rise to identical sensations.

Different complex spectral distributions usually, but not always, look different. Suitable amounts of short-, middle-, and long-wavelength lights, if additively mixed, can for example excite the R, G, and B cones exactly as does a light containing equal energy at all wavelengths. As a result, both stimuli look the same. This is an extreme example of the subjective identity of physically different stimuli known as chromatic metamerism. Additive mixture is achievable by optical superposition, rapid alternation at frequencies too high for the visual system to follow, or (as in color television) by the juxtaposition of very small elements which make up a field structure so fine as to exceed the limits of visual acuity. See Light

Although colors are often defined by appeal to standard samples, the trivariant nature of color vision permits their specification in terms of three values. Ideally these might be the relative excitations of the R, G, and B cones. Because too little was known about cone action spectra in 1931, the International Commission on Illumination (CIE) adopted at that time a different but related system for the prediction of metamers (the CIE system of colorimetry). This widely used system permits the specification of tristimulus values X, Y, and Z, which make almost the same predictions about color matches as do calculations based upon cone action spectra. If, for fields 1 and 2, X₁ = X₂, Y₁ = Y₂, and Z₁ = Z₂, then the two stimuli are said to match (and therefore have the same color) whether they are physically the same (isometric) or different (metameric).

Colors are often specified in a two-dimensional chart known as the CIE chromaticity diagram, which shows the relations among tristimulus values independently of luminance. In this plane, y is by convention plotted as a function of x, where y = Y/(X + Y + Z) and x = x/(x + Y + Z). [The value z = Z/(X + Y + Z) also equals 1 - (x + y) and therefore carries no additional information.] Such a diagram is shown in the illustration, in which the continuous locus of spectrum colors is represented by the outermost contour. All nonspectral colors are contained within an area defined by this boundary and a straight line running from red to violet. The diagram also shows discrimination data for 25 regions, which plot as ellipses represented at 10 times their actual size. A discrimination unit is one-tenth the distance from the ellipse's center to its perimeter. Predictive schemes for interpolation to other regions of the CIE diagram have been worked out.

The 1931 CIE chromaticity diagram showing discrimination ellipses enlarged 10 times

A chromaticity diagram has some very convenient properties. Chief among them is the fact that additive mixtures of colors plot along straight lines connecting the chromaticities of the colors being mixed. Although it is sometimes convenient to visualize colors in terms of the chromaticity chart, it is important to realize that this is not a psychological color diagram. Rather, the chromaticity diagram makes a statement about the results of metameric color matches, in the sense that a given point on the diagram represents the locus of all possible metamers plotting at chromaticity coordinates x, y. However, this does not specify the appearance of the color, which can be dramatically altered by preexposing the eye to colored lights (chromatic adaptation) or, in the complex scenes of real life, by other colors present in nearby or remote areas (color contrast and assimilation). Nevertheless, within limits, metamers whose color appearance is thereby changed continue to match.

For simple, directly fixated, and unstructured fields presented in an otherwise dark environment, there are consistent relations between the chromaticity coordinates of a color and the color sensations that are elicited. Therefore, regions of the chromaticity diagram are often denoted by color names, as shown in the illustration.

Although the CIE system works rather well in practice, there are important limitations. Normal human observers do not agree exactly about their color matches, chiefly because of the differential absorption of light by inert pigments in front of the photoreceptors. Much larger individual differences exist for differential colorimetry, and the system is overall inappropriate for the 4% of the population (mostly males) whose color vision is abnormal. The system works only for an intermediate range of luminances, below which rods (the receptors of night vision) intrude, and above which the bleaching of visual photopigments significantly alters the absorption spectra of the cones.

Color (quantum mechanics)

A term used to refer to a hypothetical quantum number carried by the quarks which are thought to make up the strongly interacting elementary particles. It has nothing to do with the ordinary, visual use of the word color.

The quarks which are thought to make up the strongly interacting particles have a spin angular momentum of one-half unit of h (Planck's constant). According to a fundamental theorem of relativity combined with quantum mechanics, they must therefore obey Fermi-Dirac statistics and be subject to the Pauli exclusion principle. No two quarks within a particular system can have exactly the same quantum numbers. See Exclusion principle, Fermi-Dirac statistics

However, in making up a baryon, it often seemed necessary to violate this principle. The &OHgr;^- particle, for example, is made of three strange quarks, and all three had to be in exactly the same state. O. W. Greenberg is responsible for the essential idea for the solution to this paradox. In 1964 he suggested that each quark type (u, d, and s) comes in three varieties identical in all measurable qualities but different in an additional property, which has come to be known as color. The exclusion principle could then be satisfied and quarks could remain fermions, because the quarks in the baryon would not all have the same quantum numbers. They would differ in color even if they were the same in all other respects. See Baryon, Elementary particle, Meson, Quarks

color

1. The color of a star is measured and quoted in terms of its color index but basically depends on surface temperature: the star will radiate predominantly blue, white, yellow, orange, or red light in descending order of temperature (see spectral types). Only the brightest stars have recognizable colors. Two stars of the same color may have very different luminosities. 2. Short for color index.

Color

The appearance of an object or surface, distinct from its form, shape, size, or position; depends on the spectral composition of incident light, spectral reflectance of the object, and spectral response of the observer.

Color

in art, man’s artistic expression of his ability to perceive reality in the whole wealth of color. Color is associated with all elements of artistic form, for example, composition, spatial perspective, texture, and palette. It permeates the entire material embodiment of a work of art.

Color may define the degree of distance of an object in a picture’s space (color perspective) or the relationship of an object with other objects and its surroundings. It may express the material characteristics of a particular object or its parts, as well as the general emotional tone of the artistic image. Color may form conventional systems, having a symbolic meaning (especially evident in medieval art and in art produced in the early stages of a culture). Each period in the development of world art has had its own ideas on the use of color. Color is related to style, school, and creative method.

REFERENCES

Matsa, I. L. “Problema tsveta v iskusstve,” Iskusstvo, 1933, nos 1–2.
Regel, G. Grundfragen des farbigen Gestaltens. Berlin, 1961.

V. S. TURCHIN

Color

a property of physical objects perceived as a conscious visual sensation. The various colors are “conferred” by humans on an object as the object is perceived visually.

Color sensation arises in the great majority of cases as a result of the effect produced on the eye by fluxes of electromagnetic radiation from the range of wavelengths in which such radiation can be perceived by the eye (the visible range of wavelengths is from 380 to 760 nanometers). Color sensation sometimes occurs without the action of a radiant flux on the eye as a result of pressure on the eyeball, a blow, electrical stimulation, mental association with other sensations (such as sound and heat), or the working of the imagination. Differently colored objects, differently illuminated parts of the objects, different light sources, and the illumination created by light sources induce a variety of color sensations. Moreover, even with identical relative spectral compositions of radiant fluxes, color perception may differ depending on whether radiation from light sources or from nonluminous objects strikes the eye. However, the same terms are used to designate the colors of these two different kinds of objects. Most of the objects that elicit color sensations are nonluminous objects, which merely reflect or transmit the light emitted by light sources. The color of an object is dependent, in general, on the following factors: the intrinsic coloration and properties of the object’s surface, the optical properties of the light source and of the medium through which the light is propagated, and the properties of the visual analyzer and the characteristics of the still inadequately studied process by which visual impressions are analyzed in the brain centers.

The capacity to perceive color evolved for the purpose of identifying objects along with the capacity to perceive other properties, such as size, hardness, and warmth, and movements in space. This enabled organisms to detect and recognize individual objects by their intrinsic coloration in crucial situations, regardless of any changes in lighting or the condition of the environment. This need to recognize objects is the main reason why the perceived color of an object is determined largely by the object’s intrinsic coloration; under the usual viewing conditions for humans, the identification of a color depends only slightly on illumination because the observer unconsciously makes corrections for different illuminations. For example, a green leaf of a tree is acknowledged to be green even in the reddish light of a sunset. The qualification of usual (in the broad sense) viewing conditions is very important, for if conditions are highly unusual, human judgments about the color of objects and, consequently, color sensations become unsure or erroneous. For example, descriptions of the colors of sunrises and sunsets viewed in space and attempts by various astronauts to reproduce the colors differ markedly from one another and from the colors rendered by the objective methods of color photography.

There is a persistent conception rooted in the human consciousness that a given color is an inseparable characteristic of the ordinary objects observed. Referred to as the phenomenon of color constancy, this psychological property of “belonging” is most apparent when nonluminous objects are viewed. It is due to the fact that in daily life we look at many objects simultaneously, subconsciously comparing their colors or comparing color sensations from differently colored or differently illuminated parts of the objects. The color constancy of nonluminous objects is so pronounced that even under unfavorable viewing conditions the color of an object is perceived from the recognition of the object by other features. The names of many colors originated from the names of objects whose coloration is very marked, such as raspberry, rose, and emerald. Sometimes even the color of a light source is described by the color of some characteristic nonluminous object, for example, the blood-red disk of the sun. Color constancy is not as strong for light sources, because under ordinary conditions (not related to their manufacture) they are rarely compared with other sources and the visual analyzer adapts well to the lighting conditions. An example is the vagueness of the notion of white light compared with the very definite concept of the white color of the surface of a nonluminous object (the color of a surface on all of whose parts the absorption of light is minimal over the entire visible spectrum and identical in relative intensity).

Color perception may be partly influenced by the psychophysiological condition of the observer. For example, it intensifies in dangerous situations and diminishes after the onset of fatigue. Despite the eye’s ability to adapt to light, color perception may differ markedly from ordinary conditions after a change in the intensity of radiation of the same relative spectral composition, a phenomenon discovered by the German scientists W. von Bezold and E. W. von Brücke in the 1870’s. It is clearly demonstrable in binocular colorimetry, which is based on the adaptation of one eye independently of the other. All the above factors are indicative of the important role played by the brain centers responsible for color perception and of their proper experiential training (given that the photochemical apparatus of color vision is unchanged).

The colors of the radiations whose wavelengths lie within specified intervals of the range of visible light around the wavelength of some monochromatic radiation are called spectral colors. Radiations with wavelengths ranging from 380 to 470 nanometers (nm) are violet and blue, those from 480 to 500 nm are bluegreen, those from 510 to 560 nm are green, those from 570 to 590 nm are yellow-orange, and those from 600 to 760 nm are red (in the smaller sections of these intervals the colors of the radiations correspond to different shades of these colors, many of which can be easily distinguished by a trained observer).

The ability to sense colors evolved with the formation of a special system of color vision consisting of three types of color-sensitive photoreceptors in the center of the retina (cones) with maximum spectral sensitivities in three different spectral regions: red, green, and blue. Rods, the fourth type of receptor, do not possess primary sensitivity to any one spectral color. They are situated along the periphery of the retina and play a major role in the creation of achromatic visual images. The frequently underestimated importance of the rods in the mechanism of color recognition becomes greater, the less illuminated the observed objects are. The action of fluxes of radiant energy differing in spectral composition and intensity on these four types of retinal receptors is the physicochemical basis of different perceptions of color. The combinations of photoreceptor stimuli of different intensities that are analyzed both in the peripheral conducting nerve pathways and in the brain visual centers are responsible for the great variety of color sensations.

The total spectral sensitivity of the eye caused by the action of photoreceptors of all types is highest in the green region (wavelengths of approximately.555 nm), but it shifts to the blue-green region when illumination is poor. The previously assumed reducibility of all color sensations to combinations of different stimuli of only three types of color-sensitive elements served as the basis for devising methods of expressing colors quantitatively in the form of sets of three numbers. A similar approach (see below) is based on a rational conception of the problem, but the influence of variations in illumination and in the intensity of radiation, the very important role played by the visual centers of the brain, and the general psychophysiological condition of the observer could not be taken into account in the development of such methods.

Three subjective attributes of color are used in a precise qualitative description: hue, saturation, and brightness. The division of color into these interrelated constituents is the result of an intellectual process largely dependent on habit and training. The most important attribute, hue, is associated in the mind with the dependence of the coloration of an object on the prescence of a certain type of pigment, paint, or dye. For example, a green hue is assigned to objects with a coloring similar to that of natural green containing chlorophyll. Saturation characterizes the degree, level, or strength of expression of a hue. This attribute is associated with the amount or concentration of a pigment, paint, or dye. Gray hues are called achromatic (colorless); they are considered as lacking in saturation and differing from each other only in brightness. Brightness is usually related to the amount of black or white pigment present; less commonly, to illumination. The brightness of differently colored objects is judged by comparison with achromatic objects. The achromaticity of nonluminous objects is more or less due to the uniform, identical reflection of radiations of all wavelengths within the visible spectrum.

The color of achromatic surfaces reflecting a maximum of light is called white. Even though objects that produce different color sensations when compared directly may be white according to this definition, white occupies a special position among achromatic colors of nonluminous objects. Surfaces with a white coloration often serve as standards. They are always recognized immediately, and comparison with such standards, together with adaptation of the eye, helps the observer make an unconscious correction for the given illumination. Even if only white objects are observed, the color of the illumination itself is identified from the objects. The color-shade relationships play a decisive part in the recognition of the colors of objects in the absence of standard white surfaces; these relationships are obtained from comparison of objects differing in brightness and hue with achromatic objects.

The saturation and brightness of nonluminous objects are interrelated because the intensification of selective spectral absorption with increasing quantity or concentration of a dye is invariably accompanied by a decrease in the intensity of the reflected light; this produces a sensation of decreased brightness. For example, a rose of a more saturated purple color is perceived as darker than a rose of the same, but less saturated hue.

The simultaneous viewing of identical nonluminous objects or light sources by several observers with normal color vision under identical viewing conditions reveals an unambiguous correspondence between the spectral composition of the radiations being compared and the color sensations produced. This is the basis of colorimetry. Although the correspondence is unambiguous, it is not reciprocally unambiguous, for radiant fluxes of different spectral compositions can produce identical color sensations. There are many definitions of color as a physical quantity, but even the best of them from the colorimetric standpoint does not state that this nonreciprocal unambiguity is achieved only under standardized viewing and illumination conditions. They also fail to account for changes in color perception that occur after changes in the intensity of radiation of the same spectral composition (Bezold-Brücke phenomenon) or to consider the phenomenon of color adaptation. Therefore, the diversity of color sensations arising under actual illumination conditions—with variations in the angular dimensions of elements comparable in color, with the fixation of images on different parts of the retina, and with different psychophysiological states of the observer—is always richer than the colorimetric color diversity. For example, colors that in everyday life are perceived, depending on brightness, as “grayish brown,” “chestnut brown,” “brown,” “chocolate,” “olive,” and so on are determined in colorimetry as orange or yellow. In one of the best attempts at defining color, that proposed by E. Schrödinger, the difficulties of the task are eliminated by the simple omission of any indication of the dependence of color sensations on numerous concrete viewing conditions. According to Schrödinger, color is a property of the spectral composition of radiations, which is common for radiations that cannot be distinguished by a human being.

In colorimetry, colors are designated by a set of three numbers. There are many systems, each with its own method of determining the three numbers. In one of the widely used systems, numerical values are assigned to the three subjective attributes of color described above. The numerical values are assigned either by the comparison method (by comparison with the standard colors found in color tables or atlases) or by the instrument-calculation method. In the latter, the hue is expressed by an objectively determinable wavelength (the wavelength of radiation that, in a mixture with white, reproduces the measured color), saturation is expressed by its purity (the ratio of the intensity of a monochromatic color in a mixture to white), and brightness is expressed by the objectively established brightness of the measured radiation (which is called heterochromatic), as determined experimentally or calculated from the curve of spectral luminous efficacy of the radiation (or its visibility curve). Quantitative expression of the subjective attributes of color is ambiguous because it is heavily dependent on differences between actual viewing and standardized colorimetric conditions. Hence, there are many formulas for determining brightness.

In colorimetry, special importance is attached to the measurement of spectral colors and the determination therefrom of equal-energy distribution curves characterizing the spectral sensitivity of the visual analyzer in terms of relative quantities of three radiations that, when mixed, produce the given color sensation. The colors of radiations of different spectral compositions that are perceived to be the same under identical viewing conditions are called metamers. The number of metamers of a given color increases with decreasing saturation; that is, the less saturated a color is, the more combinations there may be of mixtures of radiations of different spectral compositions that evoke the sensation of the given color. White colors exhibit the greatest number of metamers. The colors of any two radiations that create a white color in a mixture are called complementary colors. For example, blue-green and red monochromatic radiations with wavelengths of 490 nm and 595 nm, or 480 nm and 580 nm, respectively, are complementary for white obtained from a source with a color temperature of 4800°K.

An observer with normal color vision, in comparing differently colored objects or light sources, can, if he is attentive, distinguish a great many colors. A trained observer can distinguish about 150 colors by hue, about 25 by saturation, and from 64 (with good illumination) to 20 (with poor illumination) by brightness (we are referring here to “trained” brain centers responsible for color sensations). Fewer colors can be distinguished by individuals suffering from anomalies of color vision.

Approximately 90 percent of the population have normal color vision; about 10 percent are partly or completely color-blind. Characteristically, 95 percent of those with anomalies of color vision are males. There are three kinds of color vision anomalies; (1) red blindness (protanopia), the inability to distinguish red colors from dark blue complementary and achromatic colors close to them in brightness; (2) green blindness (deuteranopia), the inability to distinguish, or difficulty in distinguishing, green colors from complementary purple colors and achromatic colors close to them in brightness; and (3) blue blindness (tritanopia), the inability to distinguish blue colors from complementary dark yellow colors and achromatic colors close to them in brightness. Cases of total color blindness, in which only achromatic images are perceived, are very rare. Anomalies of color vision do not prevent the individuals affected from working. There are certain jobs, however, to which the color-blind are unsuited.

Adaptation of vision, one of the main properties of the visual analyzer, makes it possible to recognize objects by their color (as a result of the phenomenon of “belonging”) under a very wide range of illumination and viewing conditions. However, with a change in the spectral composition of the illumination, visually perceptible differences between some colors increase, and those between other colors decrease. For example, blue and green hues are harder to distinguish in the yellow illumination produced by incandescent lamps than are red and orange; red and orange hues are harder to distinguish in the bluish illumination of heavily overcast days. When the illumination is weak, all colors are harder to distinguish and are perceived to be less saturated (the twilight vision effect). When the illumination is very bright, colors are perceived to be less saturated and “whitened.” The characteristics of visual perception are widely used in the visual arts to create the illusion of particular types of illumination.

In private and public life. Color plays an exceptionally important role in the life and work of every person and of society as a whole: in industry, transport, art, and information transmission technology. Color and color combinations are extensively used in daily life and at work as symbols substituting for whole concepts in the rules of behavior. For example, traffic lights on main roads control the flow of vehicles, provide warnings, and catch the attention of motorists. In industry and other collective work, colors are used as symbols to mark pipelines carrying different substances or operating at different temperatures, various electric wires, all kinds of tags, labels, and counters, information cards, bank records, bank notes, and protective clothing.

Color is one of the main factors contributing to comfort at work and in the home. The psychological effects of certain color combinations, or color harmony, are the concern of color aesthetics. Color harmony is widely used in art and in the organization of production processes to create psychological emphases aimed at increasing labor productivity, decreasing fatigue, promoting comfort at home, and ensuring active and healthful relaxation.

Color is particularly important for increasing the quality and uniformity of industrial products. Color is indispensable as an indicator of high quality in cases where other objective or subjective methods cannot be used for one reason or another or when their use requires prolonged and labor-intensive work or costly equipment. As a result, wide use is made of comparison methods of identifying the colors of many food products and of the substances used in chemical production, food processing, and light industry, as well as in other branches of the economy. A variety of color tables, atlases, paint samples, comparators, colorimeters, color photometers, and densitometers are available for the practical application of such methods.

REFERENCES

Artiushin, L. F. Osnovy vosproizvedeniia tsveta v fotografii, kino i poligrafii. Moscow, 1970.
Gurevich, M. M. Tsvet i ego izmerenie. Moscow-Leningrad, 1950.
Kustarev, A. K. Kolorimetriia tsvetnogo televideniia. Moscow, 1967.
Evans, R. M. Vvedeniie v teoriiu tsveta. Moscow, 1964. (Translated from English.)
Wyszecki, G., and W. S. Stiles. Color Science. New York-London-Sydney, 1967.

L. F. ARTIUSHIN

color

[′kəl·ər] (optics) A general term that refers to the wavelength composition of light, with particular reference to its visual appearance. (particle physics) A hypothetical quantum number carried by quarks, so that each type of quark comes in three varieties which are identical in all measurable qualities but which differ in this additional property; this quantity determines the coupling of quarks to the gluon field.

color (perceived)

That attribute of visual perception that can be described by names such as yellow, red, blue, etc., or some combination of such names. (of an object) A characteristic of the appearance of an object, surface, etc., distinct from its form, gloss, shape, size, or position; depends on the spectral composition of the incident light, on the spectral reflectance or transmittance of the object, and on the spectral response of the observer.

colour

(US), color1. a. an attribute of things that results from the light they reflect, transmit, or emit in so far as this light causes a visual sensation that depends on its wavelengths b. the aspect of visual perception by which an observer recognizes this attribute c. the quality of the light producing this aspect of visual perception d. (as modifier): colour vision 2. a. a colour, such as red or green, that possesses hue, as opposed to achromatic colours such as white or black b. (as modifier): a colour television 3. a. the skin complexion of a person, esp as determined by his race b. (as modifier): colour prejudice 4. the use of all the hues in painting as distinct from composition, form, and light and shade 5. the distinctive tone of a musical sound; timbre 6. Physics one of three characteristics of quarks, designated red, blue, or green, but having no relationship with the physical sensation

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(dreams)Most people dream in colors, but at times some stand out more than others. Colors are symbolic and their symbolism is part of culture. We communicate with color and relate ideas with them. For example, a bride wears white and black is worn at funerals. Colors also represent energy. The meaning that you give to the colors in your dreams depends on the meaning that you give to those colors in daily life. If you “see red” when you are angry, then red symbolizes anger and not passion for you. Some generalizations have been made as to the meaning of colors in dreams. They are as follows: Black —depression, sadness, and despair. Some believe it symbolizes hidden sexual desires. Blue —spirituality, optimism, positive thoughts, communication. Some believe that when you see it in your dreams, you may be in the presence of your spiritual guide. Green —money, jealousy, health concerns, love. Red —passion, sexuality, anger, warning. White —purity, transformation, cleanliness, dignity.

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The Visible Spectrum

Apparent Color of Objects

Additive Colors

Subtractive Colors

Properties of Colors

Symbolic Uses of Color

Bibliography

Color

Color (quantum mechanics)

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Color

REFERENCES

Color

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Synonyms for color

noun the property by which the sense of vision can distinguish between objects, as a red apple and a green apple, that are very similar or identical in form and size

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noun something that imparts color

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noun skin tone, especially of the face

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noun a fresh rosy complexion

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noun fabric used especially as a symbol

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noun a deceptive outward appearance

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noun appearance of truth or authenticity

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verb to impart color to

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verb to immerse in a coloring solution

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verb to become red in the face

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verb to give an inaccurate view of by representing falsely or misleadingly

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verb to give a deceptively attractive appearance to

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Synonyms for color

noun a visual attribute of things that results from the light they emit or transmit or reflect

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Antonyms

noun interest and variety and intensity

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noun the timbre of a musical sound

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noun a race with skin pigmentation different from the white race (especially Blacks)

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