The Dreadful Boulder alongside Thawing

#15205b RGB(21,32,91)

About this color

The Dreadful Boulder alongside Thawing settles into a dark blue territory with a vivid quality that feels cool — captured at #15205b, RGB(21, 32, 91).

#15205bRGB(21, 32, 91)

HSL 231° · 63% saturation · 22% lightness

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Psychology

In its darkest registers blue becomes serious and introspective: trustworthy, professional, slightly austere.

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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

From a design perspective, this shade excels as a background for light-coloured text, as a deep accent stripe, or as an anchoring tone in dark-mode interfaces. It pairs naturally with off-whites, warm creams, and metallic highlights.

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Colour pairings

Looking at colour relationships, 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 Dreadful Boulder alongside Thawing
HEX
#15205b
RGB
rgb(21,32,91)
RGB%
rgb(8.2%,12.5%,35.7%)
HSL
hsl(231,63%,22%)
HSV
hsv(231,77%,36%)
CMYK
cmyk(77,65,0,64)
LAB
lab(15,18,-37)
LCH
lch(15,41,296)
sRGB
(0.082,0.125,0.357)
HEX8
#15205bff
CSS Name
Decimal
021032091

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Color variants

Color info

Lightness
22%
Saturation
63%
Hue
231°
Chroma
41
Temperature
WarmCool
Contrast Preview
The quick brown fox jumps over the lazy dog

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