Similarly, magenta ink absorbs its opposite, green yellow ink absorbs blue. This is also why More Red and More Cyan are treated as opposites in the Variations dialog box. In theory, cyan ink absorbs red light and reflects the remaining primaries, which is why cyan appears a bluish green.
Printed in large colorful type, these six even divisions just so happen to correspond to the three primary colors of light - red, green, and blue - alternating with the three primary pigments of print - cyan, magenta, and yellow. Cbm (with the last name, I suppose, pronounced seebim).
An absolutely equal division of colors in the rainbow tosses out orange, indigo, and violet and recruits cyan and magenta, producing Ry G. Biv, short for red, orange, yellow, green, blue, indigo, and violet. But as the labels in the circle imply, the colors don't really fi t the childhood mnemonic Roy G. The colors along the outside of the circle match those that appear in a rainbow. Pictured below, the wheel contains a continuous sequence of hues in the visible spectrum, the saturation of which ranges from vivid along the perimeter to drab gray at the center. To feel comfortable working in the Variations and Hue/Saturation dialog boxes, you have to understand the composition of a little thing called the visible-color spectrum wheel. Adjunct to Deke McClelland's article Fixing a Color Cast with Photoshop The Visible-Color Spectrum Wheel
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