Cerulean blue

[Renato]

[Cerulean] blue is by far the best crayola crayon color. It is a bright blue hue, and can be used to create startling depictions of the ocean, the american flag, and blue man group.
It can describe mood as well
In classical times, [cerulean] was used to describe blue pigments, particularly mixtures of copper and cobaltous oxides.
The first recorded use of cerulean as a color name in English was in [1590].1 The word is probably derived from the Latin word caeruleus, dark blue, blue or [blue-green], which in turn probably derives from caelulum, diminutive of [caelum], heaven, sky.2