Color mixing correspond to ideal subtractive color mixing because some light from the subtracted color is still being reflected by one component of the original paint. This results in a darker and desaturated color compared to the color that would be achieved with ideal filters. The three primary colors in subtractive mixing that produce the largest gamut are yellow, magenta and cyan, leading to the CMYK color model widely used in color printing. Historically, painters have used yellow, red and blue in place of these, resulting in reduced gamut. In subtractive mixing of color, the absence of color is white and the
Color printing are variously used in printing, the result should be a reasonable reproduction of the original, but in practice this is not the case. Due to limitations in the inks, the darker colors are dirty and muddied. To resolve this, a black separation is also created, which improves the shadow and contrast of the image. Numerous techniques exist to derive this black separation from the original image; these include grey component replacement, under color removal, and under color addition. This printing technique is referred to as CMYK (the "K" stands for "key", a traditional word for the black printing plate). Today's