This is an interesting way to explain color. In the color wheel, the colors are arranged in one of three categories: red, green, and blue. The idea is that the more red, green, and blue the colors, the more similar they are.
When I read this sentence, I think of a red and blue color wheel, and how it would be easy to see a red shape when looking at that color wheel. The more similar two colors, the more they appear to be together.
Well, here it is, a really clever way to explain the law of chromatic distribution. For those who don’t know, the law of chromatic distribution states that when two colors are close to each other, they appear to be together more often than they appear to be separated. The more close you can get a two-color combination to be, the more often the two colors appear to be together (or to be close to each other).