With brown eyes taking an overwhelming lead, all of the other eye colors have lower percentages. According to WorldAtlas, 8-10 percent of the world's population have blue eyes.

The color spectrum used in the study, showing 20 different shades of blue Sinkevičiūtė et al.

Can siblings have different eye colors? If so, why? Yes, they absolutely can have different eye colors, said Stevens. “It will depend on the shuffle of genes that are inherited by each sibling ...

People with heterochromia—or different-colored eyes—have a striking and unique appearance. Here's what causes it and just how rare it is.

With brown eyes taking an overwhelming lead, all of the other eye colors have lower percentages. According to WorldAtlas, 8-10 percent of the world's population have blue eyes.