color depth
Noun
Meaning
color depth (countable and uncountable, plural color depths)
(computer graphics) The number of bits per pixel used to store color information in an image.
Examples
Some programs - especially games - require that your system be set to a particular color depth and resolution. Often such special settings are different from your usual mode, though.
Having a color range that exceeds the content is a useless feature. citation * Color depth or color support is sometimes expressed in bits, either as the number of bits per sub-pixel or the number of bits per pixel.