For many species, the ability to see and distinguish color determines their chance of survival. Although it is not as critical to our survival as in some species, color perception in human beings plays a very functional role in society. While humans are very clearly able to name the colors they see in a given image there is no scientific way to measure the experience of a color in someone else’s mind but our own. Color is an illusion; it exists primarily in our heads (Glen, 2013). Seeing color is an internal experience for each individual person. There is no way to know what one person is seeing as red compared to their peer’s version of red. Those humans with normal vision should be able to see various shades of red, blue, and green but their versions of the colors might be slightly different based on the uniqueness of photo pigments in each of our eyes.