#040B0F#040B0F

#040B0F is a very dark, near-neutral cyan. Relative luminance 0.003; OKLCH L 14.3% C 0.016 H 229.2°. Best body text is #FFFFFF at 19.81:1 contrast (WCAG AA passes).

Color values

HEX	#040B0F
RGB	rgb(4, 11, 15)
HSL	hsl(202, 58%, 4%)
HSV	hsv(202, 73%, 6%)
CMYK	cmyk(73.3%, 26.7%, 0%, 94.1%)
CIE-LAB	lab(2.71, -1.18, -2.43)
CIE-LCH	lch(2.71, 2.70, 244.07°)
OKLab	oklab(14.31% -0.0103 -0.012)
OKLCH	oklch(14.31% 0.016 229.2)
XYZ	xyz(0.2559, 0.2996, 0.4962)
Luminance	0.0030 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B0F #0F0804

analogous

#040F0D #040B0F #04050F

triadic

#040B0F #0F040B #0B0F04

tetradic

#040B0F #0D040F #0F0804 #050F04

square

#040B0F #0D040F #0F0804 #050F04

split-complementary

#040B0F #0F0405 #0F0D04

monochromatic

#061218 #061218 #061218 #112E3F #1E5270

Accessibility & contrast

On white

19.81

#040B0F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#040B0F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B0F

19.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B0F	#FFFFFF	#000000	##FFFFFF
##040B0F	1.00	19.81	1.06	19.81
#FFFFFF	19.81	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#090B0F

Deuteranopia (green-blind)

#07090F

Tritanopia (blue-blind)

#010C0C

Achromatopsia (no color)

#0A0A0A

Design tokens & code

CSS

--color: #040b0f;
/* rgb */ color: rgb(4, 11, 15);
/* oklch */ color: oklch(14.3% 0.016 229.2);

Tailwind

colors: {
  custom: {
    50: '#484c4e',
    500: '#040b0f',
    950: '#000000',
  },
}

SCSS

$custom: #040b0f;
$custom-light: #484c4e;
$custom-dark: #000000;

JSON

{
  "hex": "#040b0f",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 15
  },
  "hsl": {
    "h": 201.818,
    "s": 57.895,
    "l": 3.725
  },
  "oklch": {
    "l": 0.14314,
    "c": 0.01581,
    "h": 229.2
  },
  "luminance": 0.003
}

Semantic roles & 50–950 ramp

primary

#040B0F

secondary

#4E3121

accent

#7F47E1

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000101

muted

#777777

Preview Lab

Preview with #040B0F

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

Preview Lab → · Contrast checker → · Palette generator →