CMYK to HSL

From CMYK to HSL

CMYK is a subtractive model built for print, expressing color as ink percentages of Cyan, Magenta, Yellow, and Key (black). HSL is an additive, screen-friendly model built around Hue, Saturation, and Lightness that maps more naturally to how people describe color. To convert between them, the CMYK values are first resolved into RGB by scaling each channel by its complementary ink and the black component, then that RGB result is converted into HSL using the standard max/min chroma formula. Because CMYK is device-dependent and HSL is not color-managed, the result is a close on-screen approximation rather than a calibrated print match. Everything runs locally in your browser — no values are uploaded anywhere.