How Blind People 'See' Colors

As photographers, we spend hours on fixing colors on our images every month. Some people might even spend hours on just one image before they will be satisfied with how the colors look (me included). This is why seeing this video, of someone who NEVER saw colors, is so interesting. Tommy Edison is blind since birth, and have never seen any color in his life. Something I cant even process. Not knowing what color is. Its too crazy for me to even imagine.