Why do we see different colors?

Color doesn't exist in the physical world - only in your brain.

The answer

Colors are not inherent properties of objects but perceptions created by our brains. Objects absorb certain wavelengths of light and reflect others; the reflected wavelengths stimulate three types of cone cells in our retinas, each sensitive to different ranges (red, green, blue). Our brain interprets the combination of signals as a specific color. This means color is entirely a neurological construct - a mantis shrimp with 16 types of color receptors perceives a world we cannot imagine.

Source: Annual Review of Neuroscience

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