Color Palette Library — 500+ Curated Palettes

Mental model

Colour decisions fail in a predictable order: people pick hues first, discover the contrast is illegal, patch the lightness, and end up with a palette whose steps are uneven and whose dark mode is an inversion.

Work the other way round. Fix the lightness ramp first — it is what makes a scale usable — then set chroma, then choose hue last, because hue is the only one of the three that is purely taste.