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1 definition found
 for colour palette
From The Free On-line Dictionary of Computing (30 December 2018) :

  colour palette
  colour look-up table
      (colour look-up table, CLUT) A device
     which converts the logical colour numbers stored in each
     pixel of video memory into physical colours, normally
     represented as RGB triplets, that can be displayed on the
     monitor.  The palette is simply a block of fast RAM which
     is addressed by the logical colour and whose output is split
     into the red, green and blue levels which drive the actual
     display (e.g. CRT).
     The number of entries (logical colours) in the palette is the
     total number of colours which can appear on screen
     simultaneously.  The width of each entry determines the number
     of colours which the palette can be set to produce.
     A common example would be a palette of 256 colours
     (i.e. addressed by eight-bit pixel values) where each colour
     can be chosen from a total of 16.7 million colours (i.e. eight
     bits output for each of red, green and blue).
     Changes to the palette affect the whole screen at once and can
     be used to produce special effects which would be much slower
     to produce by updating pixels.

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