What is the rarest hair color and eye combination?

The rarest hair and eye color combination is red hair and blue eyes. Red hair is a recessive trait and occurs in only around 1-2% of the human population. Blue eyes are also a recessive trait, with only around 8% of the world's population having them. When these two rare traits occur together, it creates an even rarer combination. Some people find this combination to be particularly striking and unique.