different eye colors are determined by genes

One of the most noticeable things about our faces is the color of our eyes.

The color of a person’s eyes comes from the pigmentation of a structure called the iris. The iris surrounds the small black hole in the center of the eye or the pupil and helps control how much light can get into the eye. The color of the iris goes from very light blue to dark brown along a continuum.

Also, people usually put eye color into three groups: blue, green/hazel, or brown. And brown is the most common eye color in the whole world.

Most of your eye color comes from your genes. It is a genetic trait that affects how much and where your melanin is.

The genes of both parents indeed have a lot to do with the color of a person’s eyes (this is called “highly heritable”), but there are many other things, like sun exposure or getting older, that also play a role. And in some cases, the child’s eye color may differ from that of his parents.

Here are some more interesting facts about eye colors.