According to the trichromatic (Young-Helmholtz) theory, we perceive color by

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The trichromatic theory, also known as the Young-Helmholtz theory, proposes that we perceive color by the relative levels of activity by three types of cones: red, blue, and green. These cones are located in the retina of the eye and respond to different wavelengths of light. The brain then processes the signals from these cones to create the perception of color. This theory can account for our ability to see millions of different colors.

According to the Trichromatic (Young-Helmholtz) Theory, We Perceive Color by