colour type
/ˈkʌlə tʌɪp/(US color type)
noun
1A type or category in respect of colour.
2 Printing. In form colourtype. A process for printing colour pictures by the use of three plates or blocks, one for each primary colour; a picture printed by this process. Now historical.
Origin
Mid 19th century; earliest use found in Proceedings of the Academy of Natural Sciences of Philadelphia. From colour + type.