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Oslo Gray

#8B8A8F

Oslo Gray is a cool medium color with the hex code #8B8A8F. This muted hue can be represented as RGB 139, 138, 143 in digital design or CMYK 3%, 3%, 0%, 44% for print applications. Find matching Pantone color.

Oslo Gray color values

HEX
#8B8A8F
RGB
139, 138, 143
HSL
252°, 2%, 55%
CMYK
3, 3, 0, 44

Shades & tints

Darker Lighter

About this color

Oslo Gray sits at 252° on the color wheel with 2% saturation and 55% lightness, placing it in the blue segment of the spectrum. At near-zero saturation, it reads as a pure gray, with hue playing almost no role in its character. At medium-high lightness, it holds its own on white backgrounds while remaining approachable.

In digital environments, Oslo Gray is rendered as rgb(139, 138, 143), where the blue channel is highest at 143, though it sits close to the other channels. This muted, medium-toned character adapts well to supporting roles: borders, disabled states, secondary text, and structural UI elements.

For print, Oslo Gray translates to a CMYK breakdown of 3C 3M 0Y 44K. With a moderate key (44%), this color uses black to deepen the chromatic channels rather than replace them, a profile that typically holds up well in both offset and digital print. No brands in the brandkit.pro library currently specify this exact hex as a named brand color.

Color harmonies

Complementary

Split-Complementary

How to use Oslo Gray

CSS Variable 

:root {
  --brand-primary: #8B8A8F;
  --brand-primary-rgb: 139, 138, 143;
}

Define as a CSS custom property for consistent theming across your site.

Tailwind Config 

colors: {
  brand: '#8B8A8F',
}

Add to your Tailwind config to use classes like bg-brand.

Print Design (CMYK) 

C: 3%
M: 3%
Y: 0%
K: 44%

Use these CMYK values in Adobe Illustrator, InDesign, or print specifications.

RGB for Screens 

rgb(139, 138, 143)
rgba(139, 138, 143, 0.8)

Use RGB notation for compatibility or add alpha channel for transparency.

Frequently asked questions

What color is #8B8A8F?
#8B8A8F is Oslo Gray, a cool medium color with RGB values of 139, 138, 143. It has a hue of 252°, 2% saturation, and 55% lightness in the HSL color space.
What is the RGB value of #8B8A8F?
The RGB color code for #8B8A8F is rgb(139, 138, 143). This means it contains 139 red, 138 green, and 143 blue in the RGB color model.
Is Oslo Gray a warm or cool color?
Oslo Gray (#8B8A8F) is a cool color with a hue between 120-300° on the color wheel.
How do I use #8B8A8F in CSS?
You can use #8B8A8F in CSS with: background-color: #8B8A8F; or color: #8B8A8F; or as an RGB value: rgb(139, 138, 143). For print design, use CMYK: 3%, 3%, 0%, 44%.

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