The Bluff by Reasonable Learning

#6381b2 RGB(99,129,178)

About this color

The Bluff by Reasonable Learning is a medium blue with a moderate character, positioned at #6381b2 on the color spectrum.

#6381b2RGB(99, 129, 178)

HSL 217° · 34% saturation · 54% 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

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

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 Bluff by Reasonable Learning
HEX
#6381b2
RGB
rgb(99,129,178)
RGB%
rgb(38.8%,50.6%,69.8%)
HSL
hsl(217,34%,54%)
HSV
hsv(217,44%,70%)
CMYK
cmyk(44,28,0,30)
LAB
lab(54,3,-29)
LCH
lch(54,29,276)
sRGB
(0.388,0.506,0.698)
HEX8
#6381b2ff
CSS Name
Decimal
099129178

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Color variants

Color info

Lightness
54%
Saturation
34%
Hue
217°
Chroma
29
Temperature
WarmCool
Contrast Preview
The quick brown fox jumps over the lazy dog

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