#040B24#040B24

#040B24 is a very dark, muted blue. Relative luminance 0.004; OKLCH L 16.0% C 0.054 H 266.1°. Best body text is #FFFFFF at 19.47:1 contrast (WCAG AA passes).

Color values

HEX	#040B24
RGB	rgb(4, 11, 36)
HSL	hsl(227, 80%, 8%)
HSV	hsv(227, 89%, 14%)
CMYK	cmyk(88.9%, 69.4%, 0%, 85.9%)
CIE-LAB	lab(3.55, 4.71, -16.47)
CIE-LCH	lch(3.55, 17.13, 285.97°)
OKLab	oklab(16.04% -0.0037 -0.0536)
OKLCH	oklch(16.04% 0.054 266.1)
XYZ	xyz(0.4881, 0.3925, 1.7188)
Luminance	0.0039 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.96

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B24 #241D04

analogous

#041B24 #040B24 #0D0424

triadic

#040B24 #24040B #0B2404

tetradic

#040B24 #24041B #241D04 #04240D

square

#040B24 #24041B #241D04 #04240D

split-complementary

#040B24 #240D04 #1B2404

monochromatic

#03081C #03081C #040B24 #0A1C5B #102D92

Accessibility & contrast

On white

19.47

#040B24 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040B24 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B24

19.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B24	#FFFFFF	#000000	##FFFFFF
##040B24	1.00	19.47	1.08	19.47
#FFFFFF	19.47	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000E25

Deuteranopia (green-blind)

#000B24

Tritanopia (blue-blind)

#001115

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #040b24;
/* rgb */ color: rgb(4, 11, 36);
/* oklch */ color: oklch(16.0% 0.054 266.1);

Tailwind

colors: {
  custom: {
    50: '#484c5e',
    500: '#040b24',
    950: '#000000',
  },
}

SCSS

$custom: #040b24;
$custom-light: #484c5e;
$custom-dark: #000000;

JSON

{
  "hex": "#040b24",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 36
  },
  "hsl": {
    "h": 226.875,
    "s": 80,
    "l": 7.843
  },
  "oklch": {
    "l": 0.16043,
    "c": 0.05372,
    "h": 266.1
  },
  "luminance": 0.00393
}

Semantic roles & 50–950 ramp

primary

#040B24

secondary

#67571D

accent

#CB31F6

background

#F4F4F5

surface

#E6E7E9

border

#C2C3C5

text

#000104

muted

#777779

Preview Lab

Preview with #040B24

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →