Blue eyes and red hair forms the rarest combo on earth. Most (natural) redheads will have brown eyes, followed by hazel or green shades.
People also ask, what is the most common hair color in the world?
Black is the most common hair color in the world, and is due to a large amount of eumelanin. Brown is also common, and is due to eumelanin mixed with a bit of pheomelanin. Blond is only found in about 2% of the world's population. It is due to very small amounts of melanin.
What color do most people dye their hair?
An estimated 50% of women over age 25 in the US dye their hair (http://www.hairstyles-7.com/hair). And blonde is just barely the most popular color - salons report that blonde is the most common dye color at 39% but brown is a close second at 37% (culled from assorted online stats).