In computer graphics, colour depth or bit depth is the number of bits used to represent the colour of a pixel in a bit mapped image or video frame, the greater the bit depth, the better the quality of stored or reproduced image. The bit depth determines or should i say demands how many colours will be displayed on an image at one time. If too many colours are shown all together at one time, the loss of the image becomes.
4-bits 16 (Standard VGA)
8-bits 256 (Super VGA, indexed color)
16-bits 65,536 (High Color)
24-bits 16,777,216 (True Color)
32-bits 16,777,216 + alpha channel15-bits 32,768 (Option on some earlier display adapters)
'True color is the specification of the color of a pixel on a display screen using a 24-bit value, which allows the possibility of up to 16,777,216 possible colors. Many displays today support only an 8-bit color value, allowing up to 256 possible colors.' - from
http://whatis.techtarget.com/definition/true-color
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