What is the rarest hair and eye color combination?

The rarest hair and eye color combination is red hair and blue eyes. Only 1-2% of the population has red hair, and an even smaller percentage of people have blue eyes. The combination of the two is due to a genetic mutation that affects the amount of melanin in the hair and eyes. This combination is most commonly found in people of Celtic descent, particularly in Scotland and Ireland. The rarity and uniqueness of this combination have made it highly coveted and admired in many cultures.