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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 ...

Genetics are a big part of it, like you would expect, but its a bit more nuanced than what we learned in high school biology.

Brown is the most common eye color worldwide by a large majority. In contrast, green is one of the rarest eye colors worldwide. The color of the eyes depends on how much melanin the eyes contain.