#040f1c

Color #040f1c

A vivid, highly saturated very dark blue.

Closest named color Black #000000 · ΔE 10.27 Nearest Tailwind class slate-950 #020618 · ΔE 3.3

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Conversions

HEX

#040f1c

RGB

rgb(4, 15, 28)

HSL

hsl(212.5, 75%, 6.3%)

HSV / HSB

hsv(212.5, 85.7%, 11%)

CMYK

cmyk(85.7%, 46.4%, 0%, 89%)

LAB

lab(4.08, 0.06, -9.43)

LCH

lch(4.08, 9.43, 270.36)

OKLCH

oklch(16.5%, 0.0329, 251.01)

HWB

hwb(212.5, 1.6%, 89%)

Harmony colors

Complementary

#1c1104

Analogous

#041b1c

#040f1c

#05041c

Triadic

#040f1c

#1c040f

#0f1c04

Split-complementary

#040f1c

#1c0504

#1b1c04

Tetradic

#040f1c

#11041c

#1c1104

#0f1c04

Square

#040f1c

#1c041b

#1c1104

#041c05

Shades

Color #040f1c mixed toward black.

#030d17

#030a13

#02080e

#010509

#010305

Tints

Color #040f1c mixed toward white.

#0e3462

#185aa7

#2e80e1

#74aaeb

#b9d5f5

Tones

Color #040f1c mixed toward gray.

#060f1a

#080f18

#0a1016

#0c1014

#0e1012

Accessibility

Aa White text on this color

19.26:1

Aa Black text on this color

1.09:1

White text reads better on this background (19.26:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#090919 · ΔE 4.5

Deuteranopia

#080819 · ΔE 4.6

Tritanopia

#051717 · ΔE 9.7

Achromatopsia

#0e0e0e · ΔE 7.8

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

Code

CSS

background-color: #040f1c;

Tailwind (arbitrary value)

bg-[#040f1c]

Related colors

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Alice Blue #f0f8ff

Steel Blue #4682b4

Frequently asked questions

#040f1c (#040f1c) is rgb(4, 15, 28) in RGB.

No, #040f1c 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 #040f1c, or check how it holds up for accessibility.

Generate a palette → Check contrast