What Is Bit Depth?

Bit depth is the number of bits used to signify the color of a single-pixel or the number of bits used for each color of a single pixel. It quantifies the number of colors that are allowed in a pixel.

Bits per pixel Number of colors available Common Name
1 2 Monochrome
2 4 CGA
4 16 EGA
8 256 VGA
16 65536 XGA, High Color
24 16777216 SVGA, True Color