#373f40

Color #373f40

A nearly neutral, gray-leaning dark cyan.

Closest named color Charcoal #36454f · ΔE 6.68 Nearest Tailwind class mist-700 #394447 · ΔE 2.2

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Conversions

HEX

#373f40

RGB

rgb(55, 63, 64)

HSL

hsl(186.7, 7.6%, 23.3%)

HSV / HSB

hsv(186.7, 14.1%, 25.1%)

CMYK

cmyk(14.1%, 1.6%, 0%, 74.9%)

LAB

lab(25.97, -3.06, -1.74)

LCH

lch(25.97, 3.52, 209.62)

OKLCH

oklch(36.1%, 0.0108, 205.85)

HWB

hwb(186.7, 21.6%, 74.9%)

Harmony colors

Complementary

#403837

Analogous

#37403c

#373f40

#373a40

Triadic

#373f40

#40373f

#3f4037

Split-complementary

#373f40

#40373a

#403c37

Tetradic

#373f40

#383740

#403837

#3f4037

Square

#373f40

#3c3740

#403837

#3a4037

Shades

Color #373f40 mixed toward black.

#2e3435

#252a2b

#1b1f20

#121515

#090a0b

Tints

Color #373f40 mixed toward white.

#556163

#738486

#96a3a5

#b9c2c3

#dce0e1

Tones

Color #373f40 mixed toward gray.

#383e3f

#383e3e

#393d3e

#3a3d3d

#3b3c3c

Accessibility

Aa White text on this color

10.78:1

Aa Black text on this color

1.95:1

White text reads better on this background (10.78:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3b3b40 · ΔE 6

Deuteranopia

#3a3a40 · ΔE 6.5

Tritanopia

#374040 · ΔE 1

Achromatopsia

#3d3d3d · ΔE 4.4

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #373f40;

Tailwind (arbitrary value)

bg-[#373f40]

Related colors

Powder Blue #b0e0e6

Cadet Blue #5f9ea0

Dark Turquoise #00ced1

Aqua #00ffff

Azure #f0ffff

Dark Cyan #008b8b

Frequently asked questions

#373f40 (#373f40) is rgb(55, 63, 64) in RGB.

No, #373f40 is not one of the 216 web-safe colors — for that, every RGB channel would have to be a multiple of 51.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

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Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

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Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

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Build something with this color

Generate a full palette from #373f40, or check how it holds up for accessibility.

Generate a palette → Check contrast