New research from the Associated Professional Sleep Societies (APSS) seems to indicate that how well you sleep may affect how well you see in color. And if you've been skimping on sleep, it may affect what you think you are seeing. A good night's sleep can restore your color perception so that you see a full spectrum of color with accuracy and clarity.
"What I love about this latest study is that it examines an aspect of life so prized by humans: being able to see a spectrum of color. This skill has enhanced human interactions for millennia, helpful to not just social interactions but in some cases survival. Granted, some people who are truly color-blind don’t have trouble getting through life. But if given the opportunity, I think most people would prefer to see all the colors of the rainbow clearly. Even if seeing color doesn’t always equate with survival, it sure makes life more exciting and, in a word, vivid."
http://blogs.webmd.com/sleep-disorders/2010/07/better-sleep-for-a-technicolor-world.html?ecd