midnight blue

noun

1. a very dark blue colour; bluish black
2. (as adjective)a midnight-blue suit

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

Examples from the Web for midnight blue

Historical Examples of midnight blue

Enveloped in a midnight-blue gown, she wandered out on deck.
Sign of the Green Arrow
Roy J. (Roy Judson) Snell
She poked a hand from beneath her midnight-blue dressing gown.
Sign of the Green Arrow
Roy J. (Roy Judson) Snell