Wiktionary
with flying colours
adv. (alternative spelling of with flying colors English)
Wikipedia
With flying colours
"With flying colours" is a popular idiom of the English language. The phrase's origins relate to ship flags.
Usage examples of "with flying colours".
She quickly put him through a few other exercises - foot extensions, outwardly rotating arm movements, shoulder protraction, upper arm and leg extensions, hand and finger extension - all of which he passed with flying colours, again even surprising himself.
Mike had slept with his first woman and, it seemed, had come out of the experience with flying colours and a French-champagne headache.
The Inspector came through the symphony concert with flying colours, which was a good deal more than could be said for many human members of the audience.