#040b1c

Color #040b1c

A vivid, highly saturated very dark blue.

Closest named color Black #000000 · ΔE 11.43 Nearest Tailwind class slate-950 #020618 · ΔE 1.4

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Conversions

HEX

#040b1c

RGB

rgb(4, 11, 28)

HSL

hsl(222.5, 75%, 6.3%)

HSV / HSB

hsv(222.5, 85.7%, 11%)

CMYK

cmyk(85.7%, 60.7%, 0%, 89%)

LAB

lab(3.15, 1.95, -10.81)

LCH

lch(3.15, 10.98, 280.23)

OKLCH

oklch(15.3%, 0.0388, 262.45)

HWB

hwb(222.5, 1.6%, 89%)

Harmony colors

Complementary

#1c1504

Analogous

#04171c

#040b1c

#09041c

Triadic

#040b1c

#1c040b

#0b1c04

Split-complementary

#040b1c

#1c0904

#171c04

Tetradic

#040b1c

#15041c

#1c1504

#0b1c04

Square

#040b1c

#1c0417

#1c1504

#041c09

Shades

Color #040b1c mixed toward black.

#030917

#030713

#02060e

#010409

#010205

Tints

Color #040b1c mixed toward white.

#0e2662

#1842a7

#2e62e1

#7496eb

#b9cbf5

Tones

Color #040b1c mixed toward gray.

#060c1a

#080d18

#0a0e16

#0c0e14

#0e0f12

Accessibility

Aa White text on this color

19.63:1

Aa Black text on this color

1.07:1

White text reads better on this background (19.63:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#070719 · ΔE 2.5

Deuteranopia

#070618 · ΔE 2.9

Tritanopia

#041615 · ΔE 12.4

Achromatopsia

#0b0b0b · ΔE 8.9

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

Code

CSS

background-color: #040b1c;

Tailwind (arbitrary value)

bg-[#040b1c]

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

#040b1c (#040b1c) is rgb(4, 11, 28) in RGB.

No, #040b1c 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 #040b1c, or check how it holds up for accessibility.

Generate a palette → Check contrast