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Chapter 12. Understanding and Applying C... > RGB Versus CMYK Versus Spot Colors

RGB Versus CMYK Versus Spot Colors

Colors used in Illustrator are divided into three basic categories: the color modes RGB and CMYK, and the various collections of spot colors. (You'll also come across the term registration color. It refers to those objects that are printed on all plates of color separations but that are not part of the image, such as registration and trim marks.) The range of colors that a color mode can reproduce is called its gamut. RGB has a substantially larger gamut than CMYK (as depicted in Figure 12.3), and can show more colors and shades of color in virtually all areas of the spectrum. (CMYK does, however, have several theoretical shades of nearly pure cyan, magenta, and yellow that are outside the RGB range.)

Figure 12.3. The larger areas represent the red, green, and blue of RGB. The smaller areas represent the CMYK colors. This theoretical depiction illustrates the overlap of the gamuts, as well as the large parts of the RGB gamut unreproducible with CMYK inks.



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