#040D17#040D17

#040D17 is a very dark, muted cyan. Relative luminance 0.004; OKLCH L 15.5% C 0.027 H 248.6°. Best body text is #FFFFFF at 19.53:1 contrast (WCAG AA passes).

Color values

HEX	#040D17
RGB	rgb(4, 13, 23)
HSL	hsl(212, 70%, 5%)
HSV	hsv(212, 83%, 9%)
CMYK	cmyk(82.6%, 43.5%, 0%, 91%)
CIE-LAB	lab(3.39, -0.34, -6.52)
CIE-LCH	lch(3.39, 6.53, 267.01°)
OKLab	oklab(15.5% -0.0097 -0.0248)
OKLCH	oklch(15.5% 0.027 248.6)
XYZ	xyz(0.3486, 0.3755, 0.8646)
Luminance	0.0038 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D17 #170E04

analogous

#041617 #040D17 #040417

triadic

#040D17 #17040D #0D1704

tetradic

#040D17 #170416 #170E04 #041704

square

#040D17 #170416 #170E04 #041704

split-complementary

#040D17 #170404 #161704

monochromatic

#050F1A #050F1A #050F1A #0D2A4B #16487F

Accessibility & contrast

On white

19.53

#040D17 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040D17 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D17

19.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D17	#FFFFFF	#000000	##FFFFFF
##040D17	1.00	19.53	1.08	19.53
#FFFFFF	19.53	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#090D17

Deuteranopia (green-blind)

#060B17

Tritanopia (blue-blind)

#000F11

Achromatopsia (no color)

#0C0C0C

Design tokens & code

CSS

--color: #040d17;
/* rgb */ color: rgb(4, 13, 23);
/* oklch */ color: oklch(15.5% 0.027 248.6);

Tailwind

colors: {
  custom: {
    50: '#484d53',
    500: '#040d17',
    950: '#000000',
  },
}

SCSS

$custom: #040d17;
$custom-light: #484d53;
$custom-dark: #000000;

JSON

{
  "hex": "#040d17",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 23
  },
  "hsl": {
    "h": 211.579,
    "s": 70.37,
    "l": 5.294
  },
  "oklch": {
    "l": 0.15502,
    "c": 0.02666,
    "h": 248.6
  },
  "luminance": 0.00376
}

Semantic roles & 50–950 ramp

primary

#040D17

secondary

#593D1E

accent

#993BED

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000102

muted

#777778

Preview Lab

Preview with #040D17

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

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