black and blue: 瘀青 E.g., The abused kid was pinched black and blue by his own mother. 這個受虐兒被自己的母親捏得青一塊紫一塊。
black and white: 黑白分明 E.g., In children’s literature, a character is often either all good or all bad; such balck-and-white situations seldom exist in real life. 兒童文學中，一個角色不是全好就是全壞；現實的人生中很少有這種黑白分明的情況。
in the black: 有盈餘 E.g., Amazon.com claims that its core businesses will soon be in the black. 亞馬遜網站宣稱它的核心事業不久就會有盈餘。
blue movie: 色情片 E.g., There is some sex in this movie, but it is not really a blue movie. 這部片子是有性的鏡頭，但不是真的色情片。
blue blood: 貴族血統 E.g., The newly-wed princess is a blue-blooded member of the royalty. 新婚的王妃是血統純正的皇室成員。
out of the blue: 突如其來 E.g., His proposal, coming out of the blue, was a complete surprise to the girl. 他突如其來的求婚，大出這個女孩的意料之外。
in the red: 赤字 E.g., The company is in the red. 公司的財務已經赤字了。
red-handed: 當場被逮 E.g., The kid was cught red-handed drinking from his father’s wine collection. 這個小孩偷喝父親收藏的酒，當場被逮。
be green: 沒有經驗；很「菜」 E.g., John is green for this job. 在這份工作上沒有經驗。
green with envy: 非常嫉妒 E.g., Seeing his colleague get the promotion, he was green with envy. 看到他的同事獲得晉升，他非常眼紅。
pink slip: 解雇通知 E.g., He got the pink slip this morning and is packing his stuff now. 他早上接到解雇通知，現在正在收拾東西。
