CMYK

Cyan-Magenta-Yellow-Black. In print design, colors are defined as a percentage of each of these 4 ink colors. For example, the CMYK abbreviation for the color black would be 0-0-0-100. In contrast, display devices (e.g., computer monitors) typically define colors using RGB. K is used rather then B for black to prevent confusion between Black and Blue. An abbreviation for the colors cyan, magenta, yellow and black. They are the core colors used in four-color process printing.