#040D18#040D18

#040D18 is a very dark, muted cyan. Relative luminance 0.004; OKLCH L 15.6% C 0.028 H 250.9°. Best body text is #FFFFFF at 19.52:1 contrast (WCAG AA passes).

Color values

HEX	#040D18
RGB	rgb(4, 13, 24)
HSL	hsl(213, 71%, 5%)
HSV	hsv(213, 83%, 9%)
CMYK	cmyk(83.3%, 45.8%, 0%, 90.6%)
CIE-LAB	lab(3.43, -0.08, -7.22)
CIE-LCH	lch(3.43, 7.22, 269.35°)
OKLab	oklab(15.58% -0.0093 -0.0268)
OKLCH	oklch(15.58% 0.028 250.9)
XYZ	xyz(0.3588, 0.3796, 0.9183)
Luminance	0.0038 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D18 #180F04

analogous

#041718 #040D18 #050418

triadic

#040D18 #18040D #0D1804

tetradic

#040D18 #180417 #180F04 #041805

square

#040D18 #180417 #180F04 #041805

split-complementary

#040D18 #180504 #171804

monochromatic

#040E1A #040E1A #040E1A #0D294C #154681

Accessibility & contrast

On white

19.52

#040D18 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040D18 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D18

19.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D18	#FFFFFF	#000000	##FFFFFF
##040D18	1.00	19.52	1.08	19.52
#FFFFFF	19.52	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#080E18

Deuteranopia (green-blind)

#060B18

Tritanopia (blue-blind)

#001011

Achromatopsia (no color)

#0C0C0C

Design tokens & code

CSS

--color: #040d18;
/* rgb */ color: rgb(4, 13, 24);
/* oklch */ color: oklch(15.6% 0.028 250.9);

Tailwind

colors: {
  custom: {
    50: '#484d54',
    500: '#040d18',
    950: '#000000',
  },
}

SCSS

$custom: #040d18;
$custom-light: #484d54;
$custom-dark: #000000;

JSON

{
  "hex": "#040d18",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 24
  },
  "hsl": {
    "h": 213,
    "s": 71.429,
    "l": 5.49
  },
  "oklch": {
    "l": 0.15575,
    "c": 0.02841,
    "h": 250.9
  },
  "luminance": 0.0038
}

Semantic roles & 50–950 ramp

primary

#040D18

secondary

#5A3F1E

accent

#9D3AEE

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000102

muted

#777778

Preview Lab

Preview with #040D18

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

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