As a subject matter expert in genetics and human biology, I can provide you with an informed answer regarding the rarity of natural hair colors.

Hair color is determined by the amount and type of pigments in the hair follicles, which are produced by cells called melanocytes. The two primary pigments are eumelanin, which is brown or black, and pheomelanin, which is yellow or red. The combination and concentration of these pigments, along with genetic factors, determine an individual's hair color.

The rarest natural hair color is generally considered to be red. This is because the genetic mutation that leads to red hair is less common than those for other colors. Red hair is primarily associated with a variation in the MC1R gene. This gene variation is most frequently found in people of Northwestern European descent, particularly the Irish, Scottish, and Welsh. The frequency of red hair can be as low as 1% in the global population, making it quite rare.

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Blue eyed redheads are super rare. Blue eyes and red hair forms the rarest combo on earth. Most (natural) redheads will have brown eyes, followed by hazel or green shades.read more >>