#040B22#040B22

#040B22 is a very dark, muted blue. Relative luminance 0.004; OKLCH L 15.8% C 0.050 H 265.5°. Best body text is #FFFFFF at 19.51:1 contrast (WCAG AA passes).

Color values

HEX	#040B22
RGB	rgb(4, 11, 34)
HSL	hsl(226, 79%, 7%)
HSV	hsv(226, 88%, 13%)
CMYK	cmyk(88.2%, 67.6%, 0%, 86.7%)
CIE-LAB	lab(3.44, 3.96, -15.09)
CIE-LCH	lch(3.44, 15.60, 284.70°)
OKLab	oklab(15.84% -0.0039 -0.0499)
OKLCH	oklch(15.84% 0.05 265.5)
XYZ	xyz(0.4584, 0.3806, 1.5624)
Luminance	0.0038 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B22 #221B04

analogous

#041A22 #040B22 #0C0422

triadic

#040B22 #22040B #0B2204

tetradic

#040B22 #22041A #221B04 #04220C

square

#040B22 #22041A #221B04 #04220C

split-complementary

#040B22 #220C04 #1A2204

monochromatic

#03091B #03091B #040B22 #0A1D59 #112E90

Accessibility & contrast

On white

19.51

#040B22 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040B22 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B22

19.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B22	#FFFFFF	#000000	##FFFFFF
##040B22	1.00	19.51	1.08	19.51
#FFFFFF	19.51	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#010E23

Deuteranopia (green-blind)

#000B22

Tritanopia (blue-blind)

#001014

Achromatopsia (no color)

#0C0C0C

Design tokens & code

CSS

--color: #040b22;
/* rgb */ color: rgb(4, 11, 34);
/* oklch */ color: oklch(15.8% 0.050 265.5);

Tailwind

colors: {
  custom: {
    50: '#484c5d',
    500: '#040b22',
    950: '#000000',
  },
}

SCSS

$custom: #040b22;
$custom-light: #484c5d;
$custom-dark: #000000;

JSON

{
  "hex": "#040b22",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 34
  },
  "hsl": {
    "h": 226,
    "s": 78.947,
    "l": 7.451
  },
  "oklch": {
    "l": 0.15842,
    "c": 0.05008,
    "h": 265.5
  },
  "luminance": 0.00381
}

Semantic roles & 50–950 ramp

primary

#040B22

secondary

#65541D

accent

#C832F5

background

#F4F4F5

surface

#E6E7E9

border

#C2C3C5

text

#000104

muted

#777779

Preview Lab

Preview with #040B22

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

Preview Lab → · Contrast checker → · Palette generator →