“I would say recent experiments lead us down a road to the idea that we don’t all see the same colors,” Neitz said.
Another color vision scientist, Joseph Carroll of the Medical College of Wisconsin, took it one step further: “I think we can say for certain that people don’t see the same colors,” he told Life’s Little Mysteries.
One person’s red might be another person’s blue and vice versa, the scientists said. You might really see blood as the color someone else calls blue, and the sky as someone else’s red. But our individual perceptions don’t affect the way the color of blood, or that of the sky, make us feel.
Hard for me to judge, but you can read more here, if that click through doesn’t work for you use http://www.lifeslittlemysteries.com/117-if-blood-is-red-why-are-veins-blue.html, hat tip goes to The Browser.