As an expert in genetics and human eye color, I can tell you that the distribution of eye colors can vary significantly among different populations and ethnic groups. However, when it comes to redheads, who typically have a genetic mutation that leads to a high production of the pigment pheomelanin, their eye colors are often influenced by the same genetic factors that determine their red hair.

Green eyes are often considered the rarest eye color for redheads. This is because the most common eye colors associated with red hair are blue and hazel, which are caused by variations in the MC1R gene, the same gene responsible for red hair. Green eyes, on the other hand, are influenced by a different set of genes and are less commonly seen in conjunction with red hair.

Here's the translation in Chinese:

作为遗传学和人类眼睛颜色领域的专家，我可以告诉你不同人群和种族群体中眼睛颜色的分布可能有很大的差异。然而，对于通常拥有导致色素色素沉着素高产量的遗传突变的红发人来说，他们的眼睛颜色通常受到与决定他们红发的相同遗传因素的影响。

绿色眼睛 通常被认为是红发人中最罕见的眼睛颜色。这是因为与红发最常相关的眼睛颜色是 蓝色 和 淡褐色，这些颜色是由 MC1R 基因的变异引起的，该基因也是负责红发的基因。相比之下，绿色眼睛受到一组不同的基因的影响，与红发结合的情况较少见。

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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 >>