But redheads have mostly reddish pheomelanin.

但是红头发的大多是淡红色的褐色素。

It gets its color from two types of melanin: brown-black eumelanin and red-yellow pheomelanin.

棕黑色的真黑色素和红黄色的褐色素。

Eumelanin is what we see in brunettes and darker-haired people, and pheomelanin is what we see in blonds and redheads.

我们在棕发和深色头发的人身上看到的是真黑素，而在金发和红发的人身上看到的是褐黑素。

It comes in two broad varieties — eumelanin, which is responsible for the black and brown colours, and pheomelanin, which lends the skin and hair yellow to reddish hues.

黑素有两大类——真黑素和非黑素，前者使皮肤和头发呈现黑色和棕色，后者使皮肤和头发呈现黄色和红色。

There's eumelanin, which gives rise to a range of brown skin tones, as well as black, brown, and blond hair, and pheomelanin, which causes the reddish browns of freckles and red hair.

一种是真黑素，负责形成一系列棕色调皮肤以及黑棕和金色毛发，另一种是褐黑素，负责形成红棕色雀斑与红色毛发。