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CMYK color model - Wikipedia
The CMYK color model is a subtractive color model, based on the CMY color
model, used in color printing, and is also used to describe the printing process
itself. CMYK refers to the four ink plates used in some color printing: cyan, ... Such
a model is called subtractive because inks "subtract" the colors red, green and
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For information on acquired colour vision defects refer to our page Acquired ... all
of their three cone types are used to perceive light colours but one type of cone ...
differences between blue and yellow, violet and red and blue and green.