Hello, I'm an expert in genetics and human biology. When it comes to the rarity of hair and eye colors, it's important to consider the genetic factors that influence these traits.

In terms of hair color, red hair is the rarest, occurring in only about 1-2% of the global population. It is caused by a genetic mutation in the MC1R gene, which is responsible for producing the pigment melanin. This mutation results in a lower amount of melanin, leading to the distinctive red hue.

For eye color, green eyes are considered the rarest, with a frequency of approximately 2% worldwide. Green eye color is a result of a combination of genetic factors that reduce the amount of melanin in the iris, along with the scattering of light by the turbid medium in the stroma of the iris.

So, the rarest hair color is red, and the rarest eye color is green.

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8. Blue eyed redheads are super rare. Blue eyes and red hair forms the rarest combo on earth. Most (natural) redheads will have brown eyes, followed by hazel or green shades.read more >>