Fact number one... Red hair and blue eyes is the rarest combination in the world The majority of natural redheads have brown eyes, with others likely to have hazel or green shades. But like red hair, blue eye colour is a recessive trait, meaning that both parents must carry the gene for a child to be blessed with it. This makes those with red hair and blue eyes the rarest minority in the world, with only 1% having both. So, each one is about as rare as a four-leaf clover. So I am one of the 1 %, I never knew this! So who's going to party with the RAREST Miss Cinnamon??!!