What saturation actually is
Saturation — sometimes called chroma — describes how pure or colorful a hue is, independent of how light or dark it is. A fully saturated red has no gray mixed into it; a zero-saturation red is indistinguishable from gray. The saturation axis exists independently of the lightness axis, though they interact perceptually. ColorArchive organizes colors into six chroma bands: Faint (10% saturation), Muted (18%), Soft (34%), Clear (54%), Vivid (74%), and Pure (92%). Each band represents a qualitatively different color register — Faint and Muted are barely-there tints; Clear and Vivid are assertive; Pure is fully saturated primary color.
