#040f1b

Color #040f1b

A vivid, highly saturated very dark blue.

Closest named color Black #000000 · ΔE 9.6 Nearest Tailwind class gray-950 #030712 · ΔE 3.3

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Conversions

HEX

#040f1b

RGB

rgb(4, 15, 27)

HSL

hsl(211.3, 74.2%, 6.1%)

HSV / HSB

hsv(211.3, 85.2%, 10.6%)

CMYK

cmyk(85.2%, 44.4%, 0%, 89.4%)

LAB

lab(4.03, -0.24, -8.71)

LCH

lch(4.03, 8.71, 268.42)

OKLCH

oklch(16.4%, 0.0311, 249.12)

HWB

hwb(211.3, 1.6%, 89.4%)

Harmony colors

Complementary

#1b1004

Analogous

#041b1b

#040f1b

#05041b

Triadic

#040f1b

#1b040f

#0f1b04

Split-complementary

#040f1b

#1b0504

#1b1b04

Tetradic

#040f1b

#10041b

#1b1004

#0f1b04

Square

#040f1b

#1b041b

#1b1004

#041b05

Shades

Color #040f1b mixed toward black.

#030d17

#030a12

#02080e

#010509

#010305

Tints

Color #040f1b mixed toward white.

#0e3661

#195ca6

#2e83e0

#74adea

#b9d6f5

Tones

Color #040f1b mixed toward gray.

#060f19

#080f17

#0a0f15

#0c0f13

#0e0f11

Accessibility

Aa White text on this color

19.28:1

Aa Black text on this color

1.09:1

White text reads better on this background (19.28:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#090919 · ΔE 4.8

Deuteranopia

#080818 · ΔE 4.7

Tritanopia

#051616 · ΔE 8.8

Achromatopsia

#0e0e0e · ΔE 7.3

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

Code

CSS

background-color: #040f1b;

Tailwind (arbitrary value)

bg-[#040f1b]

Related colors

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Light Steel Blue #b0c4de

Alice Blue #f0f8ff

Steel Blue #4682b4

Frequently asked questions

#040f1b (#040f1b) is rgb(4, 15, 27) in RGB.

No, #040f1b 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 #040f1b, or check how it holds up for accessibility.

Generate a palette → Check contrast