I have always found describing color shades interesting/mind-fuck. Does the "red" that you see "red" to me? I am red-green color blind and a lot of "red" looks "brown" to me.
Color doesn’t actually exist. We don’t see actual objects as they are, we see the light that bounces off of them. Brains will create their own way of mapping wavelengths to colors, so therefore we do not see the same thing, but we perceive it as the same.
If I opened your brain and swapped your red with blue, you would not notice.
Yes, it's kind of like wondering "Does my computer store [R,G,B]? Or is it actually stored as [B,G,R] in memory? Are they represented in 2's complement form?", etc. Functionally our perception of colour is just how we mentally represent and compare vectors with 3 (or in this case 4!) components.
That said, our shared physiology and biology as humans makes my default assumption that red looks about the same to me as to anyone else. Unless they're colourblind or tetrachromats, of course.
