If you refer to all the eyes in the world, there are too many colors; the pupil colors of human eyes are: brown, blue, green, brown, hazel, amber, yellow, gray , purple, pink.

There are only three basic colors of human iris: brown, blue and green. Other iris colors are variations of these three colors. People with albinism have pink irises because they have no pigment in their irises and can only show the color of their capillaries.

Brown... Brown is the most common human iris color. Brown irises contain a lot of melanin, and dark brown irises look like black. Brown irises are thought to be a dominant gene for human irises, but recent research suggests this is not necessarily true.

Hazel... Hazel eyes are caused by a combination of Rayleigh scattering and moderate levels of melanin in the membrane in front of the iris. Hazel is hard to define. They are described as light brown or yellowish brown in color. Some consider hazel to be an intermediate color between brown and blue irises.

Amber and yellow...Amber is more common in other animals and is also called cat's eye color.

Green... Green irises are the rarest color and are rarely seen in Europe. Occasionally seen among Celts, Germans and Slavs; outside Europe, Pashtuns distributed in the Middle East and South Asia also have green eyes.

Gray… Gray is considered a variation of blue iris. It is the second rarest color (after green).

Blue... Blue irises are more common in Europe. About 8% of the world's population has blue irises. More than 80% of Nordic people such as Icelanders, Finns and Latvians have blue eyes.

Purple... Purple is a hybrid of red and blue irises, and some people with albinism have purple irises. Elizabeth Taylor's purple eyes were one of her registered trademarks. (Reprinted from know/question/542892753.html, deleted)