资料来源 : Free On-Line Dictionary of Computing

CMYK
     
         cyan, magenta, yellow, key.
     
        A {colour model} that describes each {colour} in terms of the
        quantity of each secondary colour (cyan, magenta, yellow), and
        "key" (black) it contains.  The CMYK system is used for
        printing.  For mixing of pigments, it is better to use the
        secondary colours, since they mix subtractively instead of
        additively.  The secondary colours of light are cyan, magenta
        and yellow, which correspond to the primary colours of pigment
        (blue, red and yellow). In addition, although black could be
        obtained by mixing these three in equal proportions, in
        four-colour printing it always has its own ink.  This gives
        the CMYK model.  The K stands for "Key' or 'blacK,' so as not
        to cause confusion with the B in {RGB}.
     
        Alternative colour models are {RGB} and {HSB}.
     
        (1994-12-22)