Evidence that some cones are especially sensitive to red light, others to green light, and still others to blue light is most directly supportive of

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The Young-Helmholtz theory, also known as the trichromatic theory, suggests that there are three types of color receptors (cones) in the eye, each sensitive to a different range of wavelengths: one to short wavelengths (blue/violet), one to medium wavelengths (green/yellow), and one to long wavelengths (red/orange). This theory explains why some cones are especially sensitive to certain colors and supports the idea that color vision is based on the combination of signals from these three types of cones.

Evidence That Some Cones Are Especially Sensitive to Red Light