I am colorblind. And I am a photographer. In my particular case, and in the majority of those that are “color challenged”, being colorblind doesn’t actually mean we cannot see colors. Or at least, without borrowing your eyes and brain for a while and comparing what we see, I don’t believe this to be the case.
Technically what it means is I have color vision deficiency, which means my eyes and brain interpret things differently to you “normal” people. I lack the ability to interpret the full spectrum of colors, and quite often get confused by shades of colors that are very close together.
My particular type of colorblindness has been diagnosed as “Strong Protan” and apparently I can only see anywhere from 5% to 10% of the shades that can be seen by those that have no form of color vision deficiency… More at PetaPixel.
Interesting article which not only shows how he manages to do something the rest of us find tricky anyway, but it also teaches us something about colourblindness.