Color models
CMYK model
A color model defined by four primaries; cyan, magenta, yellow, and black. The CMYK model is based on subtractive color mixing.

How it affects UI design
Digital displays do not use CMYK or subtractive color mixing.
Related topics
Sources:
- Color models. . https://acsweb.ucsd.edu/~ncn003/CSE3/Lab2/ColorModels.htm
- Color model. Wikipedia. https://en.wikipedia.org/wiki/Color_model