Gray will form good combinations with, any of the colors shown in the circle, especially the ones lying between red and green; its best combinations being yellow, and the light tones of red, orange, and green.
COMBINATIONS OF THREE OR MORE COLORS.
In many of the best three-color combinations it will be found that they are really combinations of the primary colors in a modified form; that is, red predominates in one color, yellow in another, and blue in the other. For example, the red may be modified with gray, or shaded with black, or moved toward orange or purple; the yellow may be modified with gray, or shaded with black, or moved toward orange or green; the blue may be modified with gray, or shaded with black, or moved toward green or purple. In the combination of the three primary colors modified, they should always be moved in the same direction around the circle; that is, if the red be moved toward purple, then the yellow must be moved the same distance toward orange, and the blue the same distance toward green. If the red be moved toward orange, then the yellow must be moved the same distance toward green, and the blue the same distance toward purple. This rule will also apply to any combination of three colors shown on Plate 32.
Red will harmonize with the other two primaries, yellow and blue; also with yellow and green-blue, yellow and violet-blue, green-yellow and blue, green-yellow and violet-blue, and yellow-green and violet-blue. If the red be moved a little toward purple, or a little toward orange, then the other colors in the combination must be moved an equal distance in the same direction around the circle, so that they will be at the same relative distance from each other as before the change in the red. Any of the pairs of colors named will form a good combination with red, in their normal state, or when reduced with white, or modified with gray, or darkened with black.
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