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
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For the Commonwealth Day service—an annual event that takes place on the second Monday in March—the future queen wore a cobalt blue pleated coatdress by one of her longtime favorite designers, Catherine Walker, and a coordinating Sean Barrett hat, which Kate also wore to the same service in 2023.
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Rachel Burchfield, InStyle, 10 Mar. 2026
First came red, then cobalt blue.
—Andrea Zendejas, Vogue, 6 Mar. 2026
The first features a pair of vibrant cobalt blue Augusto Bozzi chairs.
—Lisa Lockwood, Footwear News, 30 Jan. 2026
Canary yellow, purple and cobalt blue provide a cool, bright and punchy color palette for pieces like circle skirts and statement outerwear.
—Angela Velasquez, Sourcing Journal, 20 Jan. 2026
See All Example Sentences for cobalt blue
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Rachel Burchfield, InStyle, 10 Mar. 2026
First came red, then cobalt blue.
—Andrea Zendejas, Vogue, 6 Mar. 2026
The first features a pair of vibrant cobalt blue Augusto Bozzi chairs.
—Lisa Lockwood, Footwear News, 30 Jan. 2026
Canary yellow, purple and cobalt blue provide a cool, bright and punchy color palette for pieces like circle skirts and statement outerwear.
—Angela Velasquez, Sourcing Journal, 20 Jan. 2026
See All Example Sentences for cobalt blue
Cite this Entry
“Cobalt blue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cobalt%20blue. Accessed 13 Mar. 2026.
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