Looking at people through colored glasses means judging a person according to the stereotype effect, and first defining this person in your mind.

Colored glasses, Chinese word, pronounced y ǒ usè y ǒ njǒ ng, is a metaphor for prejudice against people or things. For example, Liu Shaoqi's "Talk to North China Journalists": "Your report must be true, don't embellish it, don't wear colored glasses."