Revealed her true colours - Idioms by The Free Dictionary
reveal (one's) (true) colors (redirected from revealed her true colours)
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
30pm) WE ALWAYS knew something wasn't quite right with Jenny and at last she has revealed her true colours
She has not made you look bad; she has revealed her true colours
and will regret it in time.
Megastar Britney Spears revealed her true colours
as a fan of turkey meat during a recent trip to London.
SO, Australian singer Holly Valance has revealed her true colours
Even VW's normally lovely Allison revealed her true colours
as she also revealed the true colour of the convertible I was to drive home.