#040F0B#040F0B

#040F0B is a very dark, muted teal. Relative luminance 0.004; OKLCH L 15.5% C 0.020 H 170.8°. Best body text is #FFFFFF at 19.47:1 contrast (WCAG AA passes).

Color values

HEX	#040F0B
RGB	rgb(4, 15, 11)
HSL	hsl(158, 58%, 4%)
HSV	hsv(158, 73%, 6%)
CMYK	cmyk(73.3%, 0%, 26.7%, 94.1%)
CIE-LAB	lab(3.54, -3.72, 0.70)
CIE-LCH	lch(3.54, 3.79, 169.32°)
OKLab	oklab(15.51% -0.0199 0.0032)
OKLCH	oklch(15.51% 0.02 170.8)
XYZ	xyz(0.2813, 0.3916, 0.3773)
Luminance	0.0039 (WCAG relative)
Temperature	neutral
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040F0B #0F0408

analogous

#040F05 #040F0B #040D0F

triadic

#040F0B #0B040F #0F0B04

tetradic

#040F0B #05040F #0F0408 #0D0F04

square

#040F0B #05040F #0F0408 #0D0F04

split-complementary

#040F0B #0F040D #0F0504

monochromatic

#061812 #061812 #061812 #113F2E #1E7052

Accessibility & contrast

On white

19.47

#040F0B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040F0B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040F0B

19.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040F0B	#FFFFFF	#000000	##FFFFFF
##040F0B	1.00	19.47	1.08	19.47
#FFFFFF	19.47	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E0E0B

Deuteranopia (green-blind)

#0C0C0B

Tritanopia (blue-blind)

#020F0E

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #040f0b;
/* rgb */ color: rgb(4, 15, 11);
/* oklch */ color: oklch(15.5% 0.020 170.8);

Tailwind

colors: {
  custom: {
    50: '#484e4c',
    500: '#040f0b',
    950: '#000000',
  },
}

SCSS

$custom: #040f0b;
$custom-light: #484e4c;
$custom-dark: #000000;

JSON

{
  "hex": "#040f0b",
  "rgb": {
    "r": 4,
    "g": 15,
    "b": 11
  },
  "hsl": {
    "h": 158.182,
    "s": 57.895,
    "l": 3.725
  },
  "oklch": {
    "l": 0.15508,
    "c": 0.02016,
    "h": 170.8
  },
  "luminance": 0.00392
}

Semantic roles & 50–950 ramp

primary

#040F0B

secondary

#4E2131

accent

#477FE1

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000101

muted

#777777

Preview Lab

Preview with #040F0B

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

Preview Lab → · Contrast checker → · Palette generator →