CMYK color model
subtractive color model, used in color printing
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CMYK is a color model used in color printing that works by combining cyan, magenta, yellow, and black inks in different amounts to create the full range of colors you see on printed pages. Unlike the light-based color models used on screens, CMYK is "subtractive," meaning colors are created by removing light rather than adding it, which makes it the standard approach for producing printed materials.
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The CMYK color model is a subtractive color model used in color printing as well as describing the printing process. The abbreviation CMYK refers to the four color components used in printing: cyan, magenta, yellow, and black (the key plate).
In subtractive models, inks reduce the amount of light reflected from a white or light background. White is the color of the substrate, and black results from the combination of inks. This contrasts with additive color models (e.g., RGB color model), where colors are produced by emitting light, white results from combining all primary colors, and black represents the absence of light. The addition of black ink reduces ink consumption and produces more consistent dark tones compared to using cyan, magenta, and yellow alone.