Green Eyes: Green is one of the rarest eye colors in the world. Only about 2% of the global population has green eyes. The color is caused by a combination of a light brown or amber tint in the iris, along with the presence of melanin and the scattering of light.
Gray Eyes: Gray eyes are extremely rare, found in less than 1% of the population. The color results from the scattering of light in the iris and less melanin than brown eyes. Gray eyes may appear blue or green in different lighting.
Heterochromia (Two Different Colored Eyes): Heterochromia is a condition where a person has two eyes of different colors. It can be complete (where each eye is a different color) or sectoral (where one eye has two different colors).
Amber Eyes: Amber eyes are a golden or coppery-yellow color. Unlike the yellow eyes caused by a medical condition like jaundice, amber eyes are naturally occurring due to the presence of a unique form of melanin known as pheomelanin.
Violet Eyes: Extremely rare and often the result of a genetic mutation, violet eyes are sometimes seen in people with albinism. The condition results in a lack of pigment in the iris, which, combined with the reflection of red light, creates a purple or violet hue.
Brown Eyes with Golden or Red Flecks: While brown eyes are the most common globally, some people have a very unique variation with flecks of gold, red, or even orange in the iris.
Black Eyes: Truly black eyes are incredibly rare. What is often called "black" eyes are actually a very deep shade of brown. The lack of visible sclera (the white part of the eye) in such cases can make the eyes appear completely black, but they are technically just a very dark brown.