Colors generated by light are part of one color system (Additive or RGB Colour
System). The tangible colours which are on the surface of objects or on the
printed page are another colour system (Subtracted or CMYK colour system).
RGB: Scientists recognise the light primaries of red, green and blue. When combined,
red and green light rays produce yellow, blue and green produce cyan, red and blue
produce magenta. Red, green and blue mix to create white (light). This system applies
only to devices employing light, such as computer monitors and television sets.
CMYK: In subtractive color theory, all colors mix to yield black. In the print industry,
cyan, magenta, yellow and black are used as the primary colours. When you mix all
the colours, the result is grey.