Medically reviewed by Johnstone M. Kim, MD Key Takeaways Gray and green eye colors are the rarest in the world.Eye color is ...

Eyes are not just windows to the soul—they're kaleidoscopes of human diversity. From deep brown to icy grey, eye colours span a spectrum shaped by genetics and melanin levels. The six primary eye ...

Your genetic make-up determines a wide range of physical traits, and eye and hair color are among the most visible. Many people inherit shades that are common across the globe, such as brown eyes or ...