Modern standards tend to use bits per component, but historical lower-depth systems used bits per pixel more often.Ĭolor depth is only one aspect of color representation, expressing the precision with which the amount of each primary can be expressed the other aspect is how broad a range of colors can be expressed (the gamut). When referring to a color component, the concept can be defined as bits per component, bits per channel, bits per color (all three abbreviated bpc), and also bits per pixel component, bits per color channel or bits per sample (bps). When referring to a pixel, the concept can be defined as bits per pixel (bpp). Color depth or colour depth (see spelling differences), also known as bit depth, is either the number of bits used to indicate the color of a single pixel, or the number of bits used for each color component of a single pixel.
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