DIAGRAM II
DIAGRAM III
12. The contrasting color at any stage may be determined by proceeding in a direct line across the circle: Red has for its contrasting color green; hence, reddish orange would have for its contrasting color a bluish green, for the simple reason that if red contrasts with green and orange contrasts with blue, the color between the red and the orange would contrast with the color between the green and the blue. Let us determine the contrasting color for crimson. Crimson is simply a red slightly tinged with blue. If red contrasts with green, a shade a little to the left of red slightly tinged with blue would contrast with a shade a little to the right of green slightly tinged with yellow. In other words, crimson, RV, would contrast with yellowish green, YG. Determine at what point of the circle any color that you have in mind will come, and the contrasting color would be immediately opposite.
13. The harmony of analogy consists of the harmony of related colors or tones of one color. (See [¶ 17].)