Definition of cerulean
: resembling the blue of the sky
Did You Know?
Cerulean comes from the Latin word caeruleus, which means "dark blue" and is most likely from "caelum," the Latin word for "sky." An artist rendering a sky of blue in oils or watercolors might choose a tube of cerulean blue pigment. Birdwatchers in the eastern U.S. might look skyward and see a cerulean warbler (Dendroica cerulea). "Cerulean" is not the only color name that's closely associated with the sky. "Azure" (which ultimately comes from a Persian word for lapis lazuli, a rich blue stone) describes the color of a cloudless sky and can even be a noun meaning "the unclouded sky."
Origin and Etymology of cerulean
Latin caeruleus dark blue
First Known Use: 1662
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