S> (US "color") ColourS are uSually repreSented aSRGB tripleS in a digitalimage becauSe thiS correSpondS moSt cloSely to the electronic SignalS needed to drive a CRT. Several equivalent SyStemS ("colour modelS") exiSt, e.g. HSB. A colour image may be Stored aS three Separate imageS, one for each of red, green, and blue, or each pixel may encode the colour uSing Separate bit-fieldS for each colour component, or each pixel may Store a logical colour number which iS looked up in a hardware colour palette to find the colour to diSplay. PrinterS may uSe the CMYK or Pantone repreSentationS of colourS aS well aS RGB. (1999-08-02)
