RGB ↔ CMYK Converter
Convert three RGB values to CMYK, or four CMYK values to RGB, in either direction.
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How it works
RGB is the model used by screens (light: red, green, blue). CMYK is the model used by printing (ink: cyan, magenta, yellow, and black). This conversion uses the standard RGB↔CMYK formula — useful as a reference before printing, but the exact printed color also depends on the printer, the paper, and the color profile used. RGB is additive (screen colors add light: more light, lighter) and CMYK is subtractive (ink absorbs light: more ink, darker). That is why pure black, rgb(0, 0, 0), is cmyk(0%, 0%, 0%, 100%); white is cmyk(0%, 0%, 0%, 0%); and rgb(255, 0, 0) becomes cmyk(0%, 100%, 100%, 0%). Screens show very vivid colors (some saturated blues and greens) that ink cannot reach, so the printed version usually looks a little duller.