show one's true colors

idiom

: to show what one is really like : to reveal one's real nature or character
He seemed nice at first, but he showed his true colors during the crisis.

Dictionary Entries Near show one's true colors

show one's stuff

show one's true colors

show oneself

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“Show one's true colors.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/show%20one%27s%20true%20colors. Accessed 30 Jan. 2023.

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