Different ways of representing information about color.
Models used to specify color in computer terms are:
RGB model - A 24-bit methodology where color is specified in terms of red, green, and blue values ranging from 0 to 255.
HSB and HSL models – Color is specified as an angle from 0 to 360 degrees on a color wheel.
Other models include CMYK, CIE, YIQ, YUV, and YCC.