Cerulean

Cerulean
Color coordinates
Hex triplet	#007BA7
sRGBB (r, g, b)	(0, 123, 167)
HSV (h, s, v)	(196°, 100%, 65%)
CIELChuv (L, C, h)	(48, 56, 234°)
Source	Maerz and Paul[1]
ISCC–NBS descriptor	Strong greenish blue
B: Normalized to [0–255] (byte)

Cerulean (RGB)
Color coordinates
Hex triplet	#0040FF
sRGBB (r, g, b)	(0, 64, 255)
HSV (h, s, v)	(225°, 100%, 100%)
CIELChuv (L, C, h)	(39, 134, 264°)
Source	[Unsourced]
ISCC–NBS descriptor	Vivid blue
B: Normalized to [0–255] (byte)

Cerulean (/səˈruːliən/), also spelled caerulean, is a variety of the hue of blue that may range from a light azure blue to a more intense sky blue, and may be mixed as well with the hue of green. The first recorded use of cerulean as a colour name in English was in 1590.^[1] The word is derived from the Latin word caeruleus, "dark blue, blue, or blue-green", which in turn probably derives from caerulum, diminutive of caelum, "heaven, sky".^[2]

"Cerulean blue" is the name of a blue-green pigment consisting of cobalt stannate (Co
₂SnO
₄). The pigment was first synthesized in the late eighteenth century by Albrecht Höpfner, a Swiss chemist, and it was known as Höpfner blue during the first half of the nineteenth century. Art suppliers began referring to cobalt stannate as cerulean in the second half of the nineteenth century. It was not widely used by artists until the 1870s when it became available in oil paint.^[3]

Cerulean Blue
Color coordinates
Hex triplet	#2A52BE
sRGBB (r, g, b)	(42, 82, 190)
HSV (h, s, v)	(224°, 78%, 75%)
CIELChuv (L, C, h)	(38, 90, 260°)
Source	Maerz and Paul[4]
ISCC–NBS descriptor	Vivid blue
B: Normalized to [0–255] (byte)