出典:Wikipedia
出典:『Wikipedia』 (2011/01/11 11:33 UTC 版)
In the opponent process theory of color, there are four unique hues--the psychological primaries: red, yellow, green, and blue, relative to which other hues are defined. Unique red is a red which appears to have no yellow or blue in it; unique yellow is a yellow which appears to have no red or green in it; etc.