Manipulation
Mix colors, lighten and darken, saturate and desaturate, rotate or set hues, and premultiply alpha â in the color's own space.
Blending and compositing
Eleven separable blend modes, six Porter-Duff operators and custom OpenGL-style factors, with the source/destination order palette uses.
Color difference and contrast
Seven color difference metrics in the spaces where they are defined, plus WCAG 2.1 relative luminance, contrast ratios, pass/fail checks, most-readable picking and YIQ brightness.
Color schemes
Complementary, split-complementary, analogous, triadic and tetradic schemes, computed by rotating the hue in the color's own space, plus tinycolor-style monochromatic.