"Rarest combination of hair and eye color" refers to the combination of specific hair and eye colors that occurs with the lowest frequency in the human population.
This combination is generally considered to be red hair with green or hazel eyes, as both red hair and green eyes are relatively rare traits. The rarity of this combination is due to the fact that both red hair and green eyes are controlled by recessive genes, meaning that both parents must carry the genes for these traits in order for a child to inherit them.




