Based on the human perception of color, the HSB model describes three fundamental characteristics of color:

Hue

Color reflected from or transmitted through an object. It is measured as a location on the standard color wheel, expressed as a degree between 0° and 360°. In common use, hue is identified by the name of the color, such as red, orange, or green.

Saturation

Strength or purity of the color (sometimes called chroma). Saturation represents the amount of gray in proportion to the hue, measured as a percentage from 0% (gray) to 100% (fully saturated). On the standard color wheel, saturation increases from the center to the edge.

Brightness

Relative lightness or darkness of the color, usually measured as a percentage from 0% (black) to 100% (white).

HSB color model

H.

Hue

S.

Saturation

B.

Brightness