This countdown of the top 10 rarest eye colours worldwide reveals the genetic secrets behind unusual shades of red, violet, green, amber, gold, grey, black, blue, heterochromia, and ocular …

There is evidence that as many as 16 different genes could be responsible for eye color in humans; however, the main two genes associated with eye color variation are OCA2 and …

Jun 11, 2023 · Red/Violet: Red and violet eyes mainly occur in albinos who lack melanin, the pigment responsible for skin, hair, and eye colors. In the absence of melanin, light scatters or …

Aug 8, 2025 · Red, pink, or violet eyes occur in 0.01% of the global population due to albinism. Green eyes occur in 2% of people and are the rarest naturally occurring eye color. Gray eyes …

Mar 10, 2025 · Eye color is influenced by the production of melanin, or pigments, in the iris—the colored part of your eye. More melanin means darker eyes; less means lighter eyes.

These extremely rare eye colors usually indicate albinism, a genetic condition characterized by a lack of melanin. The reddish or violet appearance is due to visible blood vessels beneath the iris.

Jun 9, 2025 · Without pigment in the back layer of the iris, more light reflects off the retina’s blood vessels, giving the eyes a reddish or purple tint.