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