#040C18#040C18

#040C18 is a very dark, muted blue. Relative luminance 0.004; OKLCH L 15.3% C 0.030 H 254.8°. Best body text is #FFFFFF at 19.61:1 contrast (WCAG AA passes).

Color values

HEX	#040C18
RGB	rgb(4, 12, 24)
HSL	hsl(216, 71%, 5%)
HSV	hsv(216, 83%, 9%)
CMYK	cmyk(83.3%, 50%, 0%, 90.6%)
CIE-LAB	lab(3.20, 0.38, -7.55)
CIE-LCH	lch(3.20, 7.56, 272.88°)
OKLab	oklab(15.26% -0.0078 -0.0287)
OKLCH	oklch(15.26% 0.03 254.8)
XYZ	xyz(0.3464, 0.3547, 0.9142)
Luminance	0.0036 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C18 #181004

analogous

#041618 #040C18 #060418

triadic

#040C18 #18040C #0C1804

tetradic

#040C18 #180416 #181004 #041806

square

#040C18 #180416 #181004 #041806

split-complementary

#040C18 #180604 #161804

monochromatic

#040D1A #040D1A #040D1A #0D264C #154081

Accessibility & contrast

On white

19.61

#040C18 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#040C18 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C18

19.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C18	#FFFFFF	#000000	##FFFFFF
##040C18	1.00	19.61	1.07	19.61
#FFFFFF	19.61	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#070D19

Deuteranopia (green-blind)

#050B18

Tritanopia (blue-blind)

#000F10

Achromatopsia (no color)

#0C0C0C

Design tokens & code

CSS

--color: #040c18;
/* rgb */ color: rgb(4, 12, 24);
/* oklch */ color: oklch(15.3% 0.030 254.8);

Tailwind

colors: {
  custom: {
    50: '#484c54',
    500: '#040c18',
    950: '#000000',
  },
}

SCSS

$custom: #040c18;
$custom-light: #484c54;
$custom-dark: #000000;

JSON

{
  "hex": "#040c18",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 24
  },
  "hsl": {
    "h": 216,
    "s": 71.429,
    "l": 5.49
  },
  "oklch": {
    "l": 0.15258,
    "c": 0.02975,
    "h": 254.8
  },
  "luminance": 0.00355
}

Semantic roles & 50–950 ramp

primary

#040C18

secondary

#5A421E

accent

#A63AEE

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000102

muted

#777778

Preview Lab

Preview with #040C18

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

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