Red is the rarest hair color, but to understand why that’s the case, you need a basic grasp of the science. There’s a lot ...

People with blue eyes have brown pigment underneath their iris and blue eyes tend to be more sensitive to light, the doctor .

“but there are many people who have green-brown eyes.” Just as the MC1R gene determines your hair color, a single gene, OCA2, is 75% responsible for your eye color, Dr. Kaplan says. For eye ...