Color does not exist in nature as an inherent physical property. Photons possess wavelengths, frequencies, and energy states, but color itself is an internal perceptual construct generated by human eye cone cells.
The human retina houses three distinct classes of cone photoreceptors: Short (S-cones, sensitive to blue), Medium (M-cones, sensitive to green), and Long (L-cones, sensitive to red). When an artist arranges dots of paint closely together on a canvas, a technique known as optical mixing or pointillism, the eye cannot resolve the individual specks from a distance.
If microscopic dots of yellow and blue sit adjacent to one another under strong lighting, they do not chemically subtract wavelengths like wet paint. Instead, the reflected light from both dots enters the pupil side by side. The yellow reflections activate the L-cones and M-cones; the blue reflections activate the S-cones. Because all three cone sets activate evenly across the local retinal field, the viewer perceives a pale, shimmering off-white or silver rather than green.
