There are
several common models to describe colors:
HSB (for
hue, saturation, brightness),
RGB (for red, green and blue);
CMYK (for cyan, magenta, yellow, and black); and
CIE L*a*b.
The
spectrum of color seen by the human eye is wider that the gamut
(a range of available colors that a color system can display or
print) available in any color model. L*a*b has the largest
gamut, encompassing all colors in the RGB and CMYK. Typically,
the RGB gamut contains the subset of these colors that can be
viewed on a computer or television monitor (which emits red,
green and blue light). Therefore, some colors, such as pure cyan
or pure yellow, can't be displayed accurately on a monitor.
