#040F18#040F18

#040F18 is a very dark, muted cyan. Relative luminance 0.004; OKLCH L 16.2% C 0.026 H 241.9°. Best body text is #FFFFFF at 19.33:1 contrast (WCAG AA passes).

Color values

HEX	#040F18
RGB	rgb(4, 15, 24)
HSL	hsl(207, 71%, 5%)
HSV	hsv(207, 83%, 9%)
CMYK	cmyk(83.3%, 37.5%, 0%, 90.6%)
CIE-LAB	lab(3.91, -1.07, -6.51)
CIE-LCH	lch(3.91, 6.60, 260.63°)
OKLab	oklab(16.22% -0.0124 -0.0231)
OKLCH	oklch(16.22% 0.026 241.9)
XYZ	xyz(0.3857, 0.4334, 0.9273)
Luminance	0.0043 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040F18 #180D04

analogous

#041817 #040F18 #040518

triadic

#040F18 #18040F #0F1804

tetradic

#040F18 #170418 #180D04 #051804

square

#040F18 #170418 #180D04 #051804

split-complementary

#040F18 #180405 #181704

monochromatic

#04101A #04101A #04101A #0D304C #155181

Accessibility & contrast

On white

19.33

#040F18 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040F18 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040F18

19.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040F18	#FFFFFF	#000000	##FFFFFF
##040F18	1.00	19.33	1.09	19.33
#FFFFFF	19.33	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B0F18

Deuteranopia (green-blind)

#080D18

Tritanopia (blue-blind)

#001112

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #040f18;
/* rgb */ color: rgb(4, 15, 24);
/* oklch */ color: oklch(16.2% 0.026 241.9);

Tailwind

colors: {
  custom: {
    50: '#484e54',
    500: '#040f18',
    950: '#000000',
  },
}

SCSS

$custom: #040f18;
$custom-light: #484e54;
$custom-dark: #000000;

JSON

{
  "hex": "#040f18",
  "rgb": {
    "r": 4,
    "g": 15,
    "b": 24
  },
  "hsl": {
    "h": 207,
    "s": 71.429,
    "l": 5.49
  },
  "oklch": {
    "l": 0.16219,
    "c": 0.02622,
    "h": 241.9
  },
  "luminance": 0.00433
}

Semantic roles & 50–950 ramp

primary

#040F18

secondary

#5A391E

accent

#8B3AEE

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000102

muted

#777778

Preview Lab

Preview with #040F18

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

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