Color depth

From 68kMLA Wiki
Revision as of 13:30, 7 November 2007 by ChristTrekker (talk | contribs)
Jump to: navigation, search
Note icon color.pngWikipedia has more information about color depth.

Color depth is a term describing the number of bits used to represent the color of a single pixel in a computer display. This concept is also known as bit depth or bits per pixel (bpp), particularly when specified along with the number of bits used. Greater color depth gives a broader range of distinct colors. Along with monitor resolution it is one of the two factors determining how much video memory a Macintosh uses. Macs can be set to one of several color depths:

  • 1-bit (2¹ = 2 colors) monochrome/black and white
  • 4-bit (2⁴ = 16 colors)
  • 8-bit (2⁸ = 256 colors), called "hundreds" in the control panel
  • 16-bit (2¹⁶ = 65,536 colors), called "thousands" in the control panel
  • 24-bit (2²⁴ = 16,777,216 colors), called "millions" in the control panel

Because memory is most conveniently accessed by programs in even multiples of a byte (8 bits), these are the only color modes supported.