http://en.wikipedia.org/wiki/Colorfulness http://en.wikipedia.org/wiki/Colorfulness Colorfulness, chroma, and saturation are related but distinct concepts

http://en.wikipedia.org/wiki/Colorfulness http://en.wikipedia.org/wiki/Colorfulness Colorfulness, chroma, and saturation are related but distinct concepts referring to the perceived intensity of a specific color. [...] Chroma is the colorfulness relative to the brightness of another color that appears white under similar viewing conditions. Saturation is the colorfulness of a color relative to its own brightness. I don't think the original article, or Wikipedia, give a good clarification of the difference, but there does appear to be one.