Color vision is the ability to distinguish different wavelengths of electromagnetic radiation. Color vision relies on a brain perception mechanism that treats light with different wavelengths as different visual stimuli (e.g., colors). Usual color insensitive photoreceptors (the rods in human eyes) only react to the presence or absence of light and do not distinguish between specific wavelengths.
We can argue that colors are not real — they are “synthesized” by our brain to...
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source https://psychcentral.com/blog/are-colors-just-illusions-our-brains-create/

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