show your true colours | show your true colors
Meaning: You show your true colours if you show what you're really like, or you reveal your true character.
- Bob always acts like he's a strong, brave guy, but when the hurricane hit he showed his true colors. He was too scared to go check on old Mrs Flowers, our next-door neighbour.
- The players showed their true colours when they came back from three goals down to win the match.
We always thought Barry was a weak and cowardly guy, but he showed his true colours when he