Copper Bluff between the Cooling

#304ea1 RGB(48,78,161)

About this color

Copper Bluff between the Cooling is a vivid, medium-dark blue tone, fixed at #304ea1 in the RGB color space.

#304ea1RGB(48, 78, 161)

HSL 224° · 54% saturation · 41% lightness

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Psychology

Mid blue dominates corporate and tech branding precisely because it reads as dependable without being cold.

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History

In Japanese aesthetics, blue — particularly indigo — has been a central colour for centuries: the slow-dyed textiles of Tokushima remain prized for their depth and permanence.

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Design use

Practically, this medium-dark blue is comfortable as brand accents, data visualisation series, and illustrative elements. Its middle lightness gives it presence on both white and dark backgrounds.

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Colour pairings

For palette building, this blue pairs naturally with warm neutrals — tawny beiges, soft terracottas, aged brass — which amplify its cool character by contrast. Analogous blue-violets and blue-greens give a more cohesive, tonal result.

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Color Categories

Color formats

Name
Copper Bluff between the Cooling
HEX
#304ea1
RGB
rgb(48,78,161)
RGB%
rgb(18.8%,30.6%,63.1%)
HSL
hsl(224,54%,41%)
HSV
hsv(224,70%,63%)
CMYK
cmyk(70,52,0,37)
LAB
lab(35,18,-48)
LCH
lch(35,51,291)
sRGB
(0.188,0.306,0.631)
HEX8
#304ea1ff
CSS Name
Decimal
048078161

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Color variants

Color info

Lightness
41%
Saturation
54%
Hue
224°
Chroma
51
Temperature
WarmCool
Contrast Preview
The quick brown fox jumps over the lazy dog

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