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 will harmonize with the primaries, red and blue; also with purple-red and blue, orange-red and blue, orange-red and violet-blue, purple-red and green-blue, and red-purple and sea-green. Any of the pairs of colors named will form a good combination with yellow, in their normal state, or when reduced with white, or modified with gray, or darkened with black.

will harmonize with the primaries, yellow and red; also with yellow and purple-red, yellow and orange-red, green-yellow and red, green-yellow and purple-red, and green-yellow and orange-red. Any of the pairs of colors named will form a good combination with blue, in their normal state, or when reduced with white, or modified with gray, or darkened with black.

will harmonize with green and violet, green and purple-violet, blue-green and violet, blue-green and purple-violet, sea-green and purple-violet, and sea-green and purple, in their normal state, or when reduced with white, or modified with gray, or darkened with black.

will harmonize with violet and orange, violet and orange-red, blue-violet and orange-red, and purple-violet and orange, in their normal state, or when reduced with white, or modified with gray, or darkened with black.

will harmonize with orange and blue-green, orange and sea-green, yellow-orange and blue-green, yellow-orange and sea-green, and orange-yellow and sea-green, in their normal state, or when reduced with white, or modified with gray, or darkened with black.

In three-color combinations the reader can safely follow this rule—that any three colors shown in the Scale of Complementary Colors, will form a good combination when they are selected as far from one another as possible. There should be at least four colors between any two colors on the warm side of the scale, and at least five colors between any two colors on the cold side of the scale.