HSB is a color model that is somewhat analogous to Munsell's system of hue, value, and chroma in that it uses three similar axes to define a color. HSB is derived from RGB color spaces and is a device dependent color space. In HSB, the three fundamental characteristics of color are:
Hue is the 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. To view the color wheel, see Using the color wheel.
Saturation, sometimes called chroma, is the strength or purity of the color. 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 is the relative lightness or darkness of the color, usually measured as a percentage from 0% (black) to 100% (white).
You can use the HSB model in Photoshop to define a color in the Color palette or Color Picker dialog box, but there is no HSB mode available for creating and editing images.
