show (one's) (true) colours

(redirected from not show his true colours)

show (one's) (true) colours

To reveal what one really believes, thinks, or wants; to act in accordance with one's real personality, character, or disposition. Primarily heard in UK. Dave said all along that he only wanted this deal because it was in the company's best interest, but he showed his true colours once he realised that he wouldn't get any special commission for his efforts. It's only in times of crisis that your friends will really show their colours.
See also: colour, show
References in periodicals archive ?
Growl did not show his true colours in the Acomb Stakes at York, but he can be trusted to come good again in the Irish Stallion Farms EBF Conditions Stakes.
Meanwhile Flemenstar's owner Stephen Curran is adamant his horse did not show his true colours in his defeat to Sir Des Champs at Leopardstown on Saturday.