Blue, red, yellow, and green describe pure colors {unique hue}. Unique red occurs only at low brightness, because more brightness adds yellow. Other colors mix unique hues. For example, orange is reddish yellow or yellowish red, and purples are reddish blue or bluish red.
Consciousness>Consciousness>Sense>Vision>Color Vision>Colors
1-Consciousness-Sense-Vision-Color Vision-Colors
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Date Modified: 2022.0224