According to the opponent color theory, the perception of color is based on the output of _______ cones, each of them an opponency between _______ colors.

Question

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The opponent color theory posits that color perception is based on the output of three types of cones in the eye, with each type creating an opponency between two colors (e.g., red vs. green, blue vs. yellow, and black vs. white).

According to the Opponent Color Theory, the Perception of Color