Color palettes, generators, matching, and theory tools.

Adobe Color. Color wheel, harmony tool, palettes.
Canva Color Palettes. Canva library of ready-made color palettes with hex codes.
Color Hunt. Curated color palette collection.
Color Method. Interactive color matching game.
ColorBox. Systematic color scale generator.
Coolors Free tier. Web app that generates color palettes and exports them in several formats.
Gradient Horse. Experimental gradient generator.
Huemint Free tier. AI-assisted brand color generation.
Lospec Palette List. Pixel art palette repository.
Paletton. Classic color scheme designer.
Palitra. Search brand color palettes.
poline. Esoteric palette generation via polar color interpolation.
Randoma11y. Generate accessible color combinations.
Swatchr. A color palette management system for Unity.
WebGradients. Collection of free CSS gradients you can copy for web and design use.