Revealed her true colors - Idioms by The Free Dictionary
reveal (one's) (true) colors (redirected from revealed her true colors)
reveal (one's) (true) colors
To reveal what one really believes, thinks, or wants; to act in accordance with one's real personality, character, or disposition. Primarily heard in US. Dave said all along that he only wanted this deal because it was in the company's best interest, but he revealed his true colors once he realized that he wouldn't get any special commission for his efforts. It's only in times of crisis that your friends will really reveal their colors.
References in periodicals archive
Someone recently approached me to share their disappointment with one of those prominent celebrities who was very vocal and active during the elections but has now revealed her true colors
as an influence peddler claiming to have access and influence on cabinet members etc.
Jane Fonda revealed her true colors
when she falsely accused the Christian Coalition of not ``caring about children unless they are white, middle-class Christians.