(one's) true colours Idiom
Sail under false colours
Someone who sails under false colours (colors) is hypocritical or pretends to be something they aren't in order to deceive people.
True colours
If someone shows their true colours, they show themselves as they really are. ('True colors' is the American spelling.)
Under false colours
If someone does something under false colours/colors, they pretend to be something they are not in order to deceive people so that they can succeed.
With flying colours|With flying colors
If you pass something with flying colours (colors), you pass easily, with a very high mark or grade.
(one's) accurate colours
One's accurate or honest beliefs, thoughts, convictions, biases, desires, etc.; one's absolute personality, character, or disposition. Primarily heard in UK. Dave said all forth that he alone capital this accord because it was in the company's best interest, but he showed his accurate colours already he realised that he wouldn't get any appropriate agency for his efforts. You will absolutely see your friends' accurate colours back you alarm aloft them in a time of crisis.Learn more: colour, true