Saturation (chroma, intensity) - resembles making tints by adding white.
Chroma expresses the purity of a color, its saturation with the main hue, its brilliance and intensity, or how much other hues are mixed into the color.
I group all my images by saturation:
- Bright: more vivid and saturated colors with pure bright hues.
- Subtle: more pastel or earthy, less bright, desaturated colors that have more other hues mixed in, especially if muted by a complimentary hue.
- Colorful: multiple saturated colors used, often with a range of chromatically intense colors.