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

Etymology

Origin of royal blue

First recorded in 1810–20

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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 vessels are glazed a deep, glossy royal blue.

From The Wall Street Journal • Oct. 1, 2025

Their left hand is beautifully manicured in sparkling purple and royal blue.

From BBC • May 30, 2025

To achieve that, Cardinals turf manager Andy Levy arranged for 200 gallons of paint in the Rams’ royal blue and sol yellow to adorn the field and end zones.

From Los Angeles Times • Jan. 13, 2025

The entire room, including the ceiling and floor, had been painted royal blue.

From Slate • Oct. 20, 2024

Somehow, I managed to get myself dressed: gray socks, tan pants, white long-sleeved shirt, black and royal blue striped school tie, dark navy sweater vest, black shoes.

From "Winger" by Andrew Smith

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