CMYK to HSB Converter

How CMYK to HSB conversion works

CMYK is a subtractive model used for print, describing color as percentages of cyan, magenta, yellow, and black (key) ink. HSB (Hue, Saturation, Brightness) — also called HSV — is the cylindrical model designers use on screen, where hue is the angle on the color wheel (0°–360°), saturation is how vivid the color is, and brightness is how light or dark it is. There is no direct CMYK-to-HSB formula, so this tool first converts CMYK to RGB (scaling each channel by its complementary ink and dimming by the black component), then derives hue, saturation, and brightness from that RGB value. Because this skips color management, the result is a close on-screen approximation rather than a calibrated print proof. Everything runs locally in your browser. For the reverse direction see HSB to RGB, or use Color Converter to convert between all color formats at once.