Achromatopsia is also known as “complete color blindness” and is the only type that fully lives up to the term “color blind”. It is extremely rare, however, those who have achromatopsia only see the world in shades of grey, black and white.

What color does a blind person see?

While only 18 percent of people with significant visual impairments are actually totally blind, most can at least perceive light. In other words, although we cannot see colors, shapes or people, we can still tell the difference between light and dark.

Do blind people see black or gray?

A person blind from birth typically doesn't see anything… not black, not gray, not white. It's like trying to describe what your elbow sees. One of the best approximations is to close one eye and describe what it sees.