Color palette
From The Glossary of Digital Photography
A grouping of different colors selected from all of the available colors. The number of bits determines the size of the palette, that is, the number of colors in it and in the available system. For example, in a 1-bit system, such as a black-and-white cell phone, each pixel is either black or white, so the palette is two. In an 8-bit system, 256 (28) colors are possible. If the system uses 8-bit RGB, then there are 8-bits for each of the three colors and a total palette of about 16.7 million (256 x 256 x 256) colors. See also color space
