Today me and my friend was sitting. He was wearing sunglasses (different from the normal specs). Then a think came in my mind that after wearing the sunglasses we see different colour for a same thing. So, without sunglasses do we see the colour same for a same object. Might be the colour pink for me see me pink and you call pink a different colour, when I see from your eyes?
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$\begingroup$ Colour perception is relative anyway. $\endgroup$– Weather VaneCommented Jan 5, 2023 at 16:55
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2$\begingroup$ It is common knowledge which you can look up. And because when I look at various Stack Exchange threads with different background, the colour I perceive depends on the background of the previous page. Anway, after I have been lying on one side for a little while, the scene is greener in the upper eye and redder in the lower eye. So they can't both be the same colour that another person sees when upright. $\endgroup$– Weather VaneCommented Jan 5, 2023 at 16:58
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3$\begingroup$ I’m voting to close this question because it is not a question about physics. $\endgroup$– M. EnnsCommented Jan 5, 2023 at 17:01
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1$\begingroup$ And, some people cannot perceive some colours at all. This isn't philosophy. A philosophical answer might be that some people perceive the world through rose-tinted spectacles. $\endgroup$– Weather VaneCommented Jan 5, 2023 at 17:04
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1$\begingroup$ The Retinex Theory of Color Vision and many other related articles on the Internet. $\endgroup$– FarcherCommented Jan 5, 2023 at 17:17
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1 Answer
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This question is philosophical. There is no way we can know. Never the less, one can say a little bit about it.
We don't all see the same. At least some of us see colors differently.
Most people have 3 types of color receptor. For them, there are 3 primary colors. Other colors are a mix of those. That doesn't tell the full story.
There is red and dark red. Blue and dark blue. And so forth. But there is yellow and brown. There is no dark yellow. Somehow we perceive that as a separate color.
Some people are color blind. They only have two types of receptor. In the most common form, red and green are the same color. You might think the brain is set up to experience 3 types of color, but they only get 2. But...
Under the right circumstances, ordinary people can see colors beyond the usual. Each type of color receptor is stimulated by a range of colors. The ranges overlap. It turns out that every wavelength stimulates more than one receptor. See What is Gray, from a physics POV?. So no matter what light you look at, the color you see is the result of more than one receptor.
It is possible to stimulate a receptor with a probe. (Don't try this at home.) When this is done, people report seeing a color they have never seen before.
It is rare, but some people have a 4th type of color receptor. I expect those people see 4 primary colors.
I believe certain types of shrimp have 8 color receptors and 2 polarization receptors. They must see quite a few more colors than we do.
I have no idea what limits how many colors we could see, given the right input device.
Edit: Found a link in this answer to Mantis shrimp
answered Jan 5, 2023 at 17:04