Well, it states “total color blindness” so, effectively none.

My point is that when you have “total color blindness” it simply means you cannot effectively discern the difference of of color. That does not mean “black and white.”

For example, everyone has a blind spot in their eye where the optic nerve passes through the retina. This area has no photoreceptor cells, so there is a spot in each eye that cannot see. When you look through one eye and close the other, do you see a black void spot? Is it a blank white area? No. It’s just… nothing.