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

Instead, Moroney’s dressed casually in a baseball hat and jacket from the viral brand Boys Lie, the only indication of her other self a manicure in her signature cobalt blue. —Stephanie McNeal, Glamour, 3 Apr. 2025

Erivo revealed later that her manicurist, Mycah Dior, used five different OPI nail polish shades to complete the design — including the cobalt blue hue, Fiyero's My Mani, from the limited-edition Wicked collection. —Rachel Flynn, People.com, 24 Feb. 2025

Following colorful manis like cobalt blue nails, peach champagne nails, and lavender milk nails, Gomez and her longtime manicurist Tom Bachik have decided to go neutral and clean with shiny soap nails. —Ariana Yaptangco, Glamour, 7 Apr. 2025

But she’s also matched its energy by pairing it with a cobalt blue sweater. —Hannah Jackson, Vogue, 26 Feb. 2025

Word History

First Known Use

1835, in the meaning defined at sense 1

Rhymes for cobalt blue

• accrue
• ado
• ainu
• aircrew
• airscrew
• anew
• askew
• baboo
• babu
• bamboo
• beaucoup
• bijou