Gray eyes: Gray eyes are pretty rare themselves, with only around 3% of the world's population sporting them. Gray-eyed people have similar levels of melanin as blue-eyed people.

From soft glam to bold eyes, here’s how to pick makeup that enhances your unique eye color, according to makeup artists.

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 ancestor develops gray eyes, and then the eye color diversity just explodes.” Once an eye with moderate amounts of both eumelanin and pheomelanin appeared (producing gray eyes), blue and ...

“For blue and gray eye colors, I love using a warm brown liner in the waterline,” she says. “You can also smudge this out to use as a cream eyeshadow all over the lid.” ...

While some species boast only blue eyes, others have various eye colors due to dominant gene strains. In humans, blue eyes are a genetic mutation in the HERC2 gene, which inhibits OCA2 expression.

Raha's striking blue eyes have caught everyone's attention. The color of a person's eyes is determined by genetics, specifically the OCA2 and HERC2 genes on chromosome 15.

"You get blue eyes and green eyes and yellow eyes all popping up." Tabin posted his findings on the preprint database bioRxiv on Oct. 9, which means they haven't been peer-reviewed.