cobalt blue

noun

1
: a greenish-blue pigment consisting essentially of cobalt oxide and alumina
2
: a strong greenish blue

Examples of cobalt blue in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
From tangy tangerine to bold cobalt blues and electric purples, the most vibrant nail polishes for summer go with pretty much anything. — Audrey Noble, Vogue, 2 July 2026 Color also stood out, with vibrant reds, dusty pastels and pops of cobalt blue adding visual interest to otherwise monochromatic looks. — Rhonda Richford, Footwear News, 29 June 2026 The Parlor next door operates at a different frequency, with cobalt blue and deep purple walls, a slower service pace, and a menu that demands more of the kitchen. — Carrie Honaker, Bon Appetit Magazine, 5 June 2026 Instead of sticking to predictable black or tan pairs, everyone’s gravitating toward punchy shades like cherry red, cobalt blue, and neon green to wake up otherwise simple outfits. — Chaise Sanders, Travel + Leisure, 28 May 2026 See All Example Sentences for cobalt blue

Word History

First Known Use

1835, in the meaning defined at sense 1

Time Traveler
The first known use of cobalt blue was in 1835

Rhymes for cobalt blue

See All Rhymes for cobalt blue

Browse Nearby Words

cobalt bloom
cobalt blue
cobalt bronze
See all Nearby Words

Cite this Entry

“Cobalt blue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cobalt%20blue. Accessed 7 Jul. 2026.

Copy Citation

More from Merriam-Webster on cobalt blue

Britannica.com: Encyclopedia article about cobalt blue

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Popular in Grammar & Usage

See More

Is that lie 'bald-faced' or 'bold-faced'?

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

Commonly Misspelled Words

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)
See More

Popular in Wordplay

See More

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List

One-Word Oxymorons: Bittersweet, Spendthrift, and More

Ten Words Ending with a Silent ‘T’

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

Is that lie 'bald-faced' or 'bold-faced'?

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
hangman letters and game
Hangman Lightning Round Figure out which word fits in the blanks.
See All