Color and iridescence in the animal kingdom One way animals produce color is by pigments produced by the cells. In birds, the pigment melanin generates black, gray, brown, and orange colors.

Exactly how is a person's eye color determined? It depends on the amount, type and distribution of melanin, or pigment, in the iris of the eye, a genetics expert reveals — and more.

The second-rarest eye color is hazel, a mixture of brown and green with golden flecks. About 18% of Americans have hazel eyes, compared with about 5% of the world’s population. And while violet ...

Wong says "hazel eyes are thought to be the most complex and varied eye color," in another Instagram video post shared in December. This is down to their color being a mix of gold, brown and green.

Eye color is an important identifier used to describe someone's appearance in media, social interactions, and by state and national databases such as the driver's license division or passport office.

Green is also the rarest eye color in America. A 2014 survey by the Academy found that 45 percent of Americans had brown eyes, 27 percent had blue eyes, 18 percent had hazel eyes and nine percent ...

Research has found that most children’s eyes will stop changing color when they’re around 6 years old. But about 15% of people have changes in eye color all their life because of their genetic ...