Something that's cerulean is colored a clear, deep blue. On a sunny summer day, the sky is often cerulean, with just a few puffy white clouds.

Your cerulean sweater might be your favorite, since you believe it makes your eyes look cerulean as well. Tropical beaches can claim to have white sand and cerulean water, and a bright October morning often comes with a cerulean sky. The word has been around since the 17th century, from the Latin caeruleus, "dark blue," with the root caelum, "heaven" or "sky."

Definitions of cerulean

adj deep blue like the color of a clear October sky

azure, bright blue, sky-blue
being or having or characterized by hue

n a light shade of blue

azure, lazuline, sapphire, sky-blue
Type of:
blue, blueness
blue color or pigment; resembling the color of the clear sky in the daytime

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