#040b1d

Color #040b1d

A vivid, highly saturated very dark blue.

Closest named color Black #000000 · ΔE 12.18 Nearest Tailwind class slate-950 #020618 · ΔE 1.6

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Conversions

HEX

#040b1d

RGB

rgb(4, 11, 29)

HSL

hsl(223.2, 75.8%, 6.5%)

HSV / HSB

hsv(223.2, 86.2%, 11.4%)

CMYK

cmyk(86.2%, 62.1%, 0%, 88.6%)

LAB

lab(3.2, 2.26, -11.53)

LCH

lch(3.2, 11.75, 281.09)

OKLCH

oklch(15.4%, 0.0408, 263.24)

HWB

hwb(223.2, 1.6%, 88.6%)

Harmony colors

Complementary

#1d1604

Analogous

#04181d

#040b1d

#0a041d

Triadic

#040b1d

#1d040b

#0b1d04

Split-complementary

#040b1d

#1d0a04

#181d04

Tetradic

#040b1d

#16041d

#1d1604

#0b1d04

Square

#040b1d

#1d0418

#1d1604

#041d0a

Shades

Color #040b1d mixed toward black.

#030918

#030713

#02060f

#01040a

#010205

Tints

Color #040b1d mixed toward white.

#0e2663

#1740a9

#2d60e2

#7395ec

#b9caf5

Tones

Color #040b1d mixed toward gray.

#060c1b

#080d19

#0a0e17

#0c0f15

#0e1013

Accessibility

Aa White text on this color

19.61:1

Aa Black text on this color

1.07:1

White text reads better on this background (19.61:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#07071a · ΔE 2.4

Deuteranopia

#070619 · ΔE 2.8

Tritanopia

#041716 · ΔE 13.2

Achromatopsia

#0c0c0c · ΔE 9.5

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

Code

CSS

background-color: #040b1d;

Tailwind (arbitrary value)

bg-[#040b1d]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#040b1d (#040b1d) is rgb(4, 11, 29) in RGB.

No, #040b1d 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 #040b1d, or check how it holds up for accessibility.

Generate a palette → Check contrast