Horses have only two types of cones and lack red cones. They see color, but in a more muted palette than we do. Vision problems in horses can arise from problems like cataracts or uveitis that block or blur light entering the eye.

What Colours can horses not see?

A horse's vision is similar to a person who is red-green color blind. Horses can only see blues and yellows. However, unlike a human, a horse can probably not see any intermediate hues.

What colors do horses like?

What's the most inviting color? Fear not–there's guidance in science. Researchers have found that horses react more to yellow, white, black, and blue floors, as compared to floors that are green, red, brown, or gray. Horses don't seem to mind these “less favorite” colors on walls rather than floors.