I have heard stories of people with 4 types of cones instead of 3 in their eyes that allow them to see more colors or different colors than other people. I know that some animals like bees naturally have 4 cones, but is this a real thing for humans? I guess it's so rare that it sounds kind of crazy. I guess I'm also thrown off by click-baity article names like "This Woman Sees 100 Times More Colors Than The Average Person" https://www.popsci.com/article/science/woman-sees-100-times-more-colors-average-person
Does color blindness affect functionality of the cones or density of the cones?
From the article, it appears there can be a variation of deficiencies in the cones to cause color blindness, including functionality of certain cones or the number of cones.