Which is the most common eye colour?

Brown is by far the most common eye colour, with estimates suggesting that at least 70% of the world’s population has brown eyes. Brown eyes contain a lot of melanin, the same pigment that colours skin and hair, which absorbs light. Blue eyes, found in around 8 to 10% of people, actually contain very little pigment; they look blue because of the way light scatters in the iris, similar to why the sky looks blue. Green eyes are thought to belong to only about 2% of people. A 2008 study from the University of Copenhagen suggested that all blue-eyed people may share a single ancestor who lived around 6,000 to 10,000 years ago.