#1f2837

Color #1f2837

A muted very dark blue.

Closest named color Charcoal #36454f · ΔE 13.42 Nearest Tailwind class gray-800 #1e2939 · ΔE 0.8

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Conversions

HEX

#1f2837

RGB

rgb(31, 40, 55)

HSL

hsl(217.5, 27.9%, 16.9%)

HSV / HSB

hsv(217.5, 43.6%, 21.6%)

CMYK

cmyk(43.6%, 27.3%, 0%, 78.4%)

LAB

lab(15.93, 0.73, -10.94)

LCH

lch(15.93, 10.96, 273.82)

OKLCH

oklch(27.5%, 0.0307, 260.45)

HWB

hwb(217.5, 12.2%, 78.4%)

Harmony colors

Complementary

#372e1f

Analogous

#1f3437

#1f2837

#221f37

Triadic

#1f2837

#371f28

#28371f

Split-complementary

#1f2837

#37221f

#34371f

Tetradic

#1f2837

#2e1f37

#372e1f

#28371f

Square

#1f2837

#371f34

#372e1f

#1f3722

Shades

Color #1f2837 mixed toward black.

#1a212e

#151b25

#10141c

#0a0d12

#050709

Tints

Color #1f2837 mixed toward white.

#394964

#526a91

#778eb3

#a5b3cc

#d2d9e6

Tones

Color #1f2837 mixed toward gray.

#212935

#232933

#252a31

#272a2f

#292b2d

Accessibility

Aa White text on this color

14.82:1

Aa Black text on this color

1.42:1

White text reads better on this background (14.82:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#232334 · ΔE 5.4

Deuteranopia

#232233 · ΔE 6

Tritanopia

#203131 · ΔE 11.6

Achromatopsia

#282828 · ΔE 8.8

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

Code

CSS

background-color: #1f2837;

Tailwind (arbitrary value)

bg-[#1f2837]

Related colors

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Royal Blue #4169e1

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#1f2837 (#1f2837) is rgb(31, 40, 55) in RGB.

No, #1f2837 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 #1f2837, or check how it holds up for accessibility.

Generate a palette → Check contrast