#636E6E

Accessibility

5.27:1

Vs white / black

5.27:1 · 3.99:1

Sources

Library color

Codes

Formats

HEX

#636e6e

RGB

rgb(99, 110, 110)

RGBA

rgba(99, 110, 110, 1)

HSL

hsl(180, 5%, 41%)

HSLA

hsla(180, 5%, 41%, 1)

HSV

hsv(180, 10%, 43%)

LAB

lab(45.54% -4.15 -1.42)

LCH

lch(45.54% 4.39 198.89)

OKLAB

oklab(0.5289 -0.0128 -0.0039)

OKLCH

oklch(0.5289 0.0134 196.95)

XYZ

xyz(13.54, 14.93, 16.92)

CMYK

cmyk(10%, 0%, 0%, 57%)

CSS

color: #636e6e;

CSS variable

--color-636e6e: #636e6e;

SCSS

$color-636e6e: #636e6e;

JavaScript

const color = "#636e6e";

TypeScript

const color: string = "#636e6e";

React

style={{ backgroundColor: "#636e6e" }}

JSON

{ "hex": "#636e6e", "rgb": { "r": 99, "g": 110, "b": 110 }, "oklch": "oklch(0.5289 0.0134 196.95)" }

Export

Developer code

css

:root {
  --#636e6e-1: #636e6e;
}

Design systems

Nearest official tokens

An arbitrary HEX is not an official Tailwind, Material, or Bootstrap color. Distance is CIEDE2000.

Nearest Tailwind color

neutral-500

Very different · ΔE 6.26 · #737373

Nearest CSS named color

DimGray

Very different · ΔE 5.68 · #696969

Nearest Material color

grey-600

Very different · ΔE 6.66 · #757575

Nearest Bootstrap color

secondary

Very different · ΔE 5.87 · #6C757D

OKLCH

Perceptual 50–950 scale

Generated in OKLCH from this hex. Not an official Tailwind scale unless the hex itself is a Tailwind token.

50e7fafa 100d9ecec 200c6d9d9 300b0c2c2 40094a6a6 500798a8a 600637474 7004d5d5d 800374747 900233232 9500f1e1e

Palette

Tints & shades

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

f2f3f3 e5e7e7 d8dbdb cbcfcf bec3c3 b1b7b7 a4aaaa 979e9e 8a9292 7d8686 707a7a 636e6e 5b6565 535c5c 4a5353 424949 3a4040 323737 292e2e 212525 191c1c 101212 080909

Palette

Tints

Mixed toward white — soft backgrounds and highlights

f2f3f3 e5e7e7 d8dbdb cbcfcf bec3c3 b1b7b7 a4aaaa 979e9e 8a9292 7d8686 707a7a

Palette

Shades

Mixed toward black — depth, text, and emphasis

5b6565 535c5c 4a5353 424949 3a4040 323737 292e2e 212525 191c1c 101212 080909

Palette

Tones

Mixed toward neutral grey — muted UI surfaces

657070 687171 6a7373 6d7474 6f7676 727777 747979 767a7a 797c7c 7b7d7d 7e7f7f

Harmony

Complementary

Opposite on the color wheel for contrast

#636E6EStop 1 #6E6363Stop 2

Harmony

Analogous

Neighbors that sit comfortably together

#636E69Stop 1 #636E6EStop 2 #63696EStop 3

Harmony

Triadic

Evenly spaced triad for vibrant sets

#636E6EStop 1 #6E636EStop 2 #6E6E63Stop 3

Harmony

Split complementary

Base plus two accents beside the complement

#636E6EStop 1 #6E6369Stop 2 #6E6963Stop 3

Harmony

Monochromatic

Same hue, varied lightness and saturation

#303636Stop 1 #555E5EStop 2 #798686Stop 3 #A1AAAAStop 4 #C9CFCFStop 5

Using this color

Where #636e6e works

#636E6E (#636e6e) sits in the grey family at about 180° hue, 5% saturation, and 41% lightness. Contrast is 5.27:1 on white and 3.99:1 on black, so white labels read more clearly on the swatch itself. Nearest Tailwind token: neutral-500 (approximation unless the hex is an official scale stop).

Sensible jobs for this swatch

supporting UI accents
text or icons on a white canvas

On a black or near-black UI, #636e6e is 3.99:1. Prefer it as a fill, border, or large heading rather than 16px copy.

Low saturation makes this easy to overuse as a neutral. Keep one chromatic accent elsewhere so the interface does not go muddy.

Family context: Neutrality, balance, and modernity. Essential for UI chrome, typography, and systems. Common uses still include buttons, charts, and accents in the Grey range — always verify the pair for this exact hex in the contrast checker.

Similar & related colors

Nearby colors from the library by perceptual distance

American River#636E72 DimGray#696969 Bootstrap secondary#6C757D Web Safe #666666#666666 Tailwind neutral 500#737373 Material Grey 600#757575 Material Blue Grey 600#546E7A Material Grey 700#616161 Fluent Gray#605E5C Tailwind gray 500#6B7280 Tailwind zinc 500#71717A Material Blue Grey 500#607D8B