给颜色

Traditional (Taiwan): 給顏色

gěiyánsè ㄍㄟˇ ㄧㄢˊ ㄙㄜˋ

    • to show someone one's strength as a warning
    • to teach someone a lesson

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
give colour
Meaning
To show someone one's strength as a warning, as if to say "I'll show you". It is threatening in tone, as in 给他点颜色看看.

Sources