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royal blue

American

noun

a deep blue, often with a faint reddish tinge.

royal blue British

noun

1. a deep blue colour
2. ( as adjective )
  
  a royal-blue carpet

"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

Other Word Forms

Noun Inflected Forms

royal blues

plural

Etymology

Origin of royal blue

First recorded in 1810–20

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Example Sentences

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royal blue

Allen, clad in a royal blue jumpsuit, showed no visible injuries and said little at the hearing, aside from identifying himself and acknowledging that he understood the legal proceedings.

From Los Angeles Times ● Apr. 27, 2026

Sandra also asked for her coffin to be in her favourite colour, royal blue.

From BBC ● Apr. 15, 2026

In the video, Sides can be seen wearing a royal blue ballroom dancing outfit she has owned since becoming a professional dancer in 1988.

From BBC ● Feb. 18, 2026

The vessels are glazed a deep, glossy royal blue.

From The Wall Street Journal ● Oct. 1, 2025

He wore a tan suit over a royal blue shirt and striped tie.

From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023