#645B5D

Accessibility

6.57:1

Vs white / black

6.57:1 · 3.2:1

Sources

Library color

Click any stop to open

Codes

Formats

HEX

#645b5d

RGB

rgb(100, 91, 93)

RGBA

rgba(100, 91, 93, 1)

HSL

hsl(347, 5%, 37%)

HSV

hsv(347, 9%, 39%)

LAB

lab(39.55% 4.02 0.17)

LCH

lch(39.55% 4.02 2.42)

OKLAB

oklab(0.4804 0.012 0.0005)

OKLCH

oklch(0.4804 0.012 2.39)

XYZ

xyz(10.97, 10.98, 11.90)

CMYK

cmyk(0%, 9%, 7%, 61%)

CSS

color: #645b5d;

CSS variable

--color-645b5d: #645b5d;

SCSS

$color-645b5d: #645b5d;

Tailwind

slate-600

Export

Developer code

:root {
  --#645b5d-1: #645b5d;
}

Palette

Tints & shades

Full scale from light tints through the base color into deep shades

f2f1f2 e5e4e4 d8d6d7 cbc8c9 bebbbc b2adae a59fa1 989293 8b8486 7e7678 71696b 645b5d 5c5355 534c4e 4b4446 433d3e 3a3536 322e2f 2a2627 211e1f 191717 110f0f 080808

Palette

Tints

Mixed toward white — soft backgrounds and highlights

f2f1f2 e5e4e4 d8d6d7 cbc8c9 bebbbc b2adae a59fa1 989293 8b8486 7e7678 71696b

Palette

Shades

Mixed toward black — depth, text, and emphasis

5c5355 534c4e 4b4446 433d3e 3a3536 322e2f 2a2627 211e1f 191717 110f0f 080808

Palette

Tones

Mixed toward neutral grey — muted UI surfaces

665e60 696163 6b6466 6d6769 706a6c 726e6f 747171 777474 797777 7b7a7a 7e7d7d

Harmony

Complementary

Opposite on the color wheel for contrast

#645B5DStop 1 #5A6361Stop 2

Harmony

Analogous

Neighbors that sit comfortably together

#635A60Stop 1 #645B5DStop 2 #635C5AStop 3

Harmony

Triadic

Evenly spaced triad for vibrant sets

#645B5DStop 1 #5C635AStop 2 #5A5C63Stop 3

Harmony

Split complementary

Base plus two accents beside the complement

#645B5DStop 1 #5A635CStop 2 #5A6063Stop 3

Harmony

Monochromatic

Same hue, varied lightness and saturation

#363032Stop 1 #5E5557Stop 2 #86797CStop 3 #AAA1A3Stop 4 #CFC9CBStop 5

Meaning

Color psychology

Neutrality, balance, and modernity. Essential for UI chrome, typography, and systems.

Common uses: primary buttons, chart series, status badges, marketing gradients, and brand accents in the Grey family.

Similar & related colors

Nearby colors from the library by perceptual distance

Fluent Gray#605E5C Material Grey 700#616161 Web Safe #666666#666666 DimGray#696969 Material Grey 600#757575 Material You Secondary#625B71 Bootstrap secondary#6C757D Fill Tertiary#787880 Material Grey 800#424242 Chakra gray 600#4A5568 Gray#808080 Tailwind slate 600#475569