The number of colors defined by software will not represent exactly all the colors a system can display; the software colors are arbitrarily defined and at disc

The number of colors defined by software will not represent exactly all the colors a system can display; the software colors are arbitrarily defined and at discrete levels. I expect that any system can physically output colors in addition to the software definitions, including in-between colors and especially, assuming the engineers left margin for error, colors at the extremes of brightness and hue could be generated.