Eye color
Brown
In humans, brown eyes contain large amounts of melanin (eumelanin) within the iris stroma which serves to absorb light, particularly at the shorter wavelengths. Very dark brown irises may appear to be black.
Brown is predominant and, in many populations, it is (with few exceptions) one of the only iris colors present. It is least common in the countries around the Baltic Sea.
Those of mixed European and non-European ancestry generally have dark eyes, but with more variability in eye color within their families than those from more homogenous origins. Inhabitants indigenous to Africa, Asia and the Americas generally have brown eyes. Brown eyes are equally found in Europe and Oceania, though within some European populations they are not predominant to the same extent.
