Reasonable Atoll across Arching

#66818c RGB(102,129,140)

About this color

Reasonable Atoll across Arching settles into a medium-dark blue territory with a muted quality that feels cool — captured at #66818c, RGB(102, 129, 140).

#66818cRGB(102, 129, 140)

HSL 197° · 16% saturation · 47% 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

In design terms, a mid-toned blue like this handles 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

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
Reasonable Atoll across Arching
HEX
#66818c
RGB
rgb(102,129,140)
RGB%
rgb(40%,50.6%,54.9%)
HSL
hsl(197,16%,47%)
HSV
hsv(197,27%,55%)
CMYK
cmyk(27,8,0,45)
LAB
lab(52,-7,-9)
LCH
lch(52,11,232)
sRGB
(0.4,0.506,0.549)
HEX8
#66818cff
CSS Name
Decimal
102129140

Similar colors

Color variants

Color info

Lightness
47%
Saturation
16%
Hue
197°
Chroma
11
Temperature
WarmCool
Contrast Preview
The quick brown fox jumps over the lazy dog

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