yellow在形容人时有“胆怯、懦弱” 的意思,口语中常用a yellow dog 表示卑鄙的人。I really wonder why the two of them lead a cat-and-dog life?
例如:Whenever they made mischief, be tried to stand in the gray. 每当他们搬弄是非时,他总是恪守中立。黄色在英语和汉语中的引申含义差别比较大。