well, as I've seen tossed around by any number of philosophies is that our sensation of reality is purely fabricated by our brain and the constructs it has built. miniscule differences in our particulate and molecular composition could have dramatic effects from one person to another, and i don't think anyone's really done the reasearch at such a fine scale to determine these differences. The ratio of chemicals and enzymes released from the rods and cones in your eyes could have any number of effects that are both undefined and impossible to prove the final outcome since your only source of information on the final conclusion is coming from someone who, invariably, has been trained from day one to register that particular enzyme release as green, blue, red, etc.
although, by using this same logic, we do know that all protein manufacture and it's variables is rooted in your DNA structure, and given the negligible differences between one strand of DNA to another's, I think it's safe to say that one person's red is also another person's red without too much tangible difference, except, of course, in cases of color blindness, and who, in the end, can really say what they're registering in lieu of those colors since, once again, their perception has been labeled from day one for communication purposes.
What should concern you is the use of color in commercial stimulation, such as restaurants using colors like peach, green, and red to inspire hunger in their patrons. The identification of color is one facet of the ultimate perception of color, what it does to the body, and tangible effects on our neuropathways and physiological changes that occur with their presence.