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
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The all-in-one pieces range from hot pink, cobalt blue, metallics and even a black PVC piece. Alyce Collins, MSNBC Newsweek, 11 Dec. 2025 When the 45-story, 2,716-room hotel debuted in 2005, lead designer Roger Thomas opted for a theatrical jewel-toned palette, featuring cobalt blue, lacquer red, deep persimmon, chartreuse silk, espresso woods, and gold leaf accents. David Morris, Travel + Leisure, 25 Nov. 2025 Upstairs, the primary suite flaunts an arched fireplace finished in cobalt blue tile, a curving balcony, and a ladder ascending to a loft retreat overlooking the coastline all the way to Point Dume. Wendy Bowman, Robb Report, 18 Nov. 2025 To add some interest, Jenner wore an extra-long, cobalt blue scarf. Anna Cafolla, Vogue, 30 Oct. 2025 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

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Cite this Entry

“Cobalt blue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cobalt%20blue. Accessed 19 Dec. 2025.

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