Tetrachromacy

Everyone learns about the rods and cones in their eyes at some point in school. To put it simply, they are responsible for humans' ability to discern between hues. Because humans have three sets and dogs only have two, they see fewer colors than humans. They do, however, see some color. Then there are animals with 12 legs, such as shrimp. That implies they must see a dizzying array of hues that the human mind can never understand because humans lack one. the ability to see more colors than humans. Except for those who are capable.

There are no humans with shrimp-level vision, but some do have tetrachromacy. That means they have four cones instead of three and can see colors that the rest of people cannot. This illness only affects women and has received little attention. The reason for this is that it's nearly impossible to know if you have it. Because how would you know if you see more colors than others? You don't know how they see the world and they don't know how you see it. If you encounter a totally new shade of red and someone refers to it as red, you're likely to agree, even if it appears vastly different to everyone else.