#040d1f

Color #040d1f

A vivid, highly saturated very dark blue.

Closest named color Black #000000 · ΔE 13.02 Nearest Tailwind class slate-950 #020618 · ΔE 2.4

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Conversions

HEX

#040d1f

RGB

rgb(4, 13, 31)

HSL

hsl(220, 77.1%, 6.9%)

HSV / HSB

hsv(220, 87.1%, 12.2%)

CMYK

cmyk(87.1%, 58.1%, 0%, 87.8%)

LAB

lab(3.73, 2.01, -12.31)

LCH

lch(3.73, 12.47, 279.27)

OKLCH

oklch(16.1%, 0.0413, 260.24)

HWB

hwb(220, 1.6%, 87.8%)

Harmony colors

Complementary

#1f1604

Analogous

#041b1f

#040d1f

#09041f

Triadic

#040d1f

#1f040d

#0d1f04

Split-complementary

#040d1f

#1f0904

#1b1f04

Tetradic

#040d1f

#16041f

#1f1604

#0d1f04

Square

#040d1f

#1f041b

#1f1604

#041f09

Shades

Color #040d1f mixed toward black.

#030b1a

#030915

#020710

#01040a

#010205

Tints

Color #040d1f mixed toward white.

#0d2a65

#1648ab

#2d6ae4

#739ced

#b9cdf6

Tones

Color #040d1f mixed toward gray.

#060e1d

#090f1b

#0b0f18

#0d1016

#0f1114

Accessibility

Aa White text on this color

19.4:1

Aa Black text on this color

1.08:1

White text reads better on this background (19.4:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#08081c · ΔE 3.2

Deuteranopia

#07071b · ΔE 3.2

Tritanopia

#041918 · ΔE 13.9

Achromatopsia

#0d0d0d · ΔE 9.9

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

Code

CSS

background-color: #040d1f;

Tailwind (arbitrary value)

bg-[#040d1f]

Related colors

Cornflower Blue #6495ed

Royal Blue #4169e1

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#040d1f (#040d1f) is rgb(4, 13, 31) in RGB.

No, #040d1f 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 #040d1f, or check how it holds up for accessibility.

Generate a palette → Check contrast