With flying colours

[rainbow402]

Dear Teacher,

I know what the meaning of " with flying colours" is. My questions are belows:

1. Is it a British idiom?

2. Is " colours" referred to Jack union or a flag?

Thank you!

 

[Horsa]

Yes you are right! :up: It's a naval idiom.

 

[rainbow402]

Mr. Horsa, thank you very much for your answer.