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Slate

#645E6E

Slate is a cool medium color with the hex code #645E6E. This muted hue can be represented as RGB 100, 94, 110 in digital design or CMYK 9%, 15%, 0%, 57% for print applications. Find matching Pantone color.

Slate Color Values

HEX
#645E6E
RGB
100, 94, 110
HSL
263°, 8%, 40%
CMYK
9, 15, 0, 57

Shades & Tints

Darker Lighter

About this color

Slate sits at 263° on the color wheel, placing it in the cool color family, typically conveying calm and professionalism. With 8% saturation and 40% lightness, this muted medium hue balances visibility with restraint.

In digital design, cool colors like Slate work well for backgrounds, navigation, and establishing trust. Medium-toned colors offer versatility across both light and dark design themes.

When using Slate in print, the CMYK breakdown of 9%, 15%, 0%, 57% ensures accurate color reproduction. This balanced CMYK profile should reproduce consistently across different printing methods.

Color Harmonies

Complementary

Analogous

Triadic

Split-Complementary

How to use Slate

CSS Variable 

:root {
  --brand-primary: #645E6E;
  --brand-primary-rgb: 100, 94, 110;
}

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

Tailwind Config 

colors: {
  brand: '#645E6E',
}

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

Print Design (CMYK) 

C: 9%
M: 15%
Y: 0%
K: 57%

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

RGB for Screens 

rgb(100, 94, 110)
rgba(100, 94, 110, 0.8)

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

Frequently Asked Questions

What color is #645E6E?
#645E6E is Slate, a cool medium color with RGB values of 100, 94, 110. It has a hue of 263°, 8% saturation, and 40% lightness in the HSL color space.
What is the RGB value of #645E6E?
The RGB color code for #645E6E is rgb(100, 94, 110). This means it contains 100 red, 94 green, and 110 blue in the RGB color model.
Is Slate a warm or cool color?
Slate (#645E6E) is a cool color with a hue between 120-300° on the color wheel.
How do I use #645E6E in CSS?
You can use #645E6E in CSS with: background-color: #645E6E; or color: #645E6E; or as an RGB value: rgb(100, 94, 110). For print design, use CMYK: 9%, 15%, 0%, 57%.

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