in black and white

Từ điển Oxford Advanced Learner 8th

▪ I. in black and white idiom
in writing or in print
•I never thought they'd put it in black and white on the front page.
Main entry: ↑black_idiom
 
▪ II. (in) black and white idiom
in a way that makes people or things seem completely bad or good, or completely right or wrong
•It's a complex issue, but he only sees it in black and white.
•This is not a black-and-white decision (= where the difference between two choices is completely clear).
Main entry: ↑black_idiom