The Atoll from Practical Closing

#3757ad RGB(55,87,173)

About this color

The Atoll from Practical Closing is a vivid, medium-dark blue tone, fixed at #3757ad in the RGB color space.

#3757adRGB(55, 87, 173)

HSL 224° · 52% saturation · 45% 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

The ancient Egyptians were among the first to produce blue pigment artificially — Egyptian blue, made from copper and sand, coloured the walls of pharaonic tombs.

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Design use

Practically, this medium-dark blue is comfortable as accent colours, call-to-action buttons, and icon fills — it holds its own without overwhelming adjacent elements. Always check WCAG contrast ratios before using it under or over text.

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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
The Atoll from Practical Closing
HEX
#3757ad
RGB
rgb(55,87,173)
RGB%
rgb(21.6%,34.1%,67.8%)
HSL
hsl(224,52%,45%)
HSV
hsv(224,68%,68%)
CMYK
cmyk(68,50,0,32)
LAB
lab(39,17,-50)
LCH
lch(39,53,289)
sRGB
(0.216,0.341,0.678)
HEX8
#3757adff
CSS Name
Decimal
055087173

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Color variants

Color info

Lightness
45%
Saturation
52%
Hue
224°
Chroma
53
Temperature
WarmCool
Contrast Preview
The quick brown fox jumps over the lazy dog

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