Dark glasses screened his eyes from the sun.

他戴了一副墨镜，保护眼睛不受阳光照射。

《牛津词典》

youdao

Even if you have dark skin, you still need protection from the sun.

即使你皮肤黝黑，仍需要防晒。

《牛津词典》

This is because lighter colors take in less of the strong heat of the sun than dark colors do.

VOA: special.2009.08.19

Scientists measure solar activity by counting dark areas on the sun's surface.

VOA: special.2009.09.29

Finally,the sun went down, and the battlefield became dark.

VOA: special.2009.09.24

Lino is as thin as a whippet, all sinew and lean muscle, and dark with the sun.

BBC: Sardinia, land and sea

We all shouted, and the happiness at having found them again was already fraught with the pain of having lost them now forever, as the moon rising in the dark sky sent out only the reflections of the sun on its lakes and fields.

NEWYORKER: The Daughters of the Moon

Perhaps the reason is that those who toiled all day in the fields became dark while the aristocratic elite, protected from the sun, remained pristine white.

BBC: A Point Of View: How China sees a multicultural world