Dictionary.com
Thesaurus.com

false colours

British  

plural noun

  1. a flag to which one is not entitled, flown esp in order to deceive

    the ship was sailing under false colours

  2. an assumed or misleading name or guise

    to trade under false colours

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The new photographs include images in false colours that clearly show the shape of Carn Glas.

From BBC • Sep. 26, 2023

We came here somewhat under false colours, to try and find out about this murder, and in the hope we might discover some proofs of Captain Mervyn's innocence.

From The Curse of Carne's Hold A Tale of Adventure by Henty, G. A. (George Alfred)

I only strike my false colours; and you know they were never carried willingly.”

From Tales from Blackwood Volume 4 by Various

She felt suddenly guilty, as though she were in some way parading in false colours.

From Stubble by Looms, George

This is the article, my countrymen, which knaves and blockheads have so often dressed up in false colours, and requested your attention to the construction of it.

From Essays on the Constitution of the United States by Ford, Paul Leicester