有没有有颜色的英语成语或谚语阿？

关于颜色的英语习语－white

英语中有大量习语，它们通常短小精悍、干净利落、言简意丰，虽寥寥数语却极能传情达意－－如果上天把这么好的表达方式摆在你面前你能无动于衷吗？不能吧！那么就让偶们来看看今天的

【Topic of the Day: White】
[1] a white elephant

释义：a very costly possession that is worthless to its owner and only a cause of trouble.

例句：You have bought yourself a white elephant,this house is far too isolated.No one will stay here and the upkeep will ruin you.

说明：相传一国王曾以白象送予敌人，以瓦解对方。

[2] show the white feather

释义：to act in a cowardly way.

例句：The only time he showed the white feather was just before they attacked the enemy.

说明：该习语原指斗鸡的人认为有白羽毛的斗鸡不是良种鸡。

[3] show the white flag

释义：to surrender and have no desire to continue resistance.

例句：They failed,so they show the white flag to their enemy.

说明：该习语源出打败仗的部队向敌军举起白旗，表示投降。

Ok, Now let's have a guess,what on earth do the following phrases underlined mean?

“if you wish