+29 Rarest Eye Color Hair Color Combination Ideas. This combination is incredibly unique and occurs in less than 1% of the human population. In other words, all parents must have the alleles for blue eyes for the trait to.

99% of the icelandic population has blue or green eyes. In other words, all parents must have the alleles for blue eyes for the trait to. Web if you have the rarest hair and eye color combination, you're one in a million—or more!