If you have the rarest hair color and eye color combination, you're one in a million—or more! Do you have dark brown hair and brown eyes? Then you have something in common with most people ...

For example, you can try out a color combination using the Brite Hair's Instant Color ($10), which Backe says will wash out in five to 30 shampoos. The shades work well on naturally light or ...

which is why they make up such a large percentage of hair-eye color combinations. Parents can also be carriers for recessive genes. While they may display the dominant genes, they still have ...

As Toves-Vincilione notes, "In art, the color wheel will never lie." But it's still totally customizable, as there are many combinations that can work for you when it comes to hair color.