Dollars are called greenbacks because that is the color of the back side of the paper money.

VOA: special.2009.11.15

As I say, there's a certain instability which could never apply in the semiotics of the stoplight because there it's not so much a question of but rather the insistence that the color is just that color.

我承认，颜色的选择有时候是有规律的,但是在语义学上这解释不通,因为他们不考虑,但是语义学家认为颜色只单纯表示颜色。

耶鲁公开课 - 文学理论导论课程节选

And, and now it's just because of the size and the color.

现在它有名是因为它的规模和颜色。

我住的地方是 - SpeakingMax英语口语达人

The bridge has always been painted "International Orange" because that color went well with the natural surroundings.

VOA: special.2010.07.23

The men knew it was the middle of the day because the color of the sea changed from slate gray to emerald green, with gold lights.

VOA: special.2011.04.09

But because of his color no law school in Tennessee would admit him.

VOA: special.2010.04.24

And because most of the new immigrants are people of color, cultural adjustments must be made by all groups in America if we are to learn to live together as one nation."

VOA: special.2011.03.20

After his Army discharge, no law school in his native Tennessee would admit him because of his color.

VOA: standard.2010.04.16

The bronze medals are largely copper because burnished bronze and gold are similar in color, and the mint did not want any confusion as to which medal an athlete receives.

VOA: standard.2010.02.16

When one imagines that a talent that great and a person with that much inner and outer beauty could have had obstacles simply because of the color of her skin, it makes me weep."

VOA: standard.2010.05.15