noncolor
noun
non·col·or ˌnän-ˈkə-lər 
: a drab or muted color or a color such as black, white, or gray as distinguished from red, blue, yellow, etc.
… the furniture is upholstered in fabrics that are natural not only in fiber but in color. … Only a few notes of red, in a small table and a pair of chests, punctuate the range of noncolors.
Joan Chatfield-Taylor
—often used before another noun Joan Chatfield-Taylor noncolor photography [=black and white photography]
Example Sentences
Recent Examples on the Web Or noncolor: Anyone know the answer to this eternal question? Mark Holgate, Vogue, 28 Aug. 2018
Mark Holgate, Vogue, 28 Aug. 2018 Word History
First Known Use
1893, in the meaning defined above