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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In translucent polymer clay and pigments, the artworks are colored in emerald green and cobalt blue and are part of the collaboration with Secci Gallery. Luisa Zargani, Footwear News, 23 Sep. 2025 Lowered into its famous cobalt blue waters, Emmy started a 1,075-foot descent to the bottom of Lake Tahoe. Amelia Wu, Sacbee.com, 11 Sep. 2025 Anna Wintour wore a custom SS Daley dress, the British brand founded by Steven Stokey-Daley, in a beautiful cobalt blue and white hue. Nadja Sayej, Forbes.com, 5 Sep. 2025 The deep alpine lake straddling the state lines of California and Nevada needs no introduction—Lake Tahoe’s sparkling, cobalt blue waters and sweeping Sierra Nevada mountain views have been mesmerizing people for centuries. Christina Pérez, Vogue, 30 Aug. 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 29 Sep. 2025.

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