noun
a cerulean blue color
adjective
a deep blue color like that of a clear sky
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The artist used cerulean paint to create a beautiful sky in the landscape painting.
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I love the cerulean color of your new dress, it's so pretty!
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Check out that cerulean car, it's really cool!
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The cerulean waters of the ocean stretched out endlessly before us, a symbol of freedom and possibility.