#040B10#040B10

#040B10 is a very dark, near-neutral cyan. Relative luminance 0.003; OKLCH L 14.4% C 0.017 H 235.2°. Best body text is #FFFFFF at 19.80:1 contrast (WCAG AA passes).

Color values

HEX	#040B10
RGB	rgb(4, 11, 16)
HSL	hsl(205, 60%, 4%)
HSV	hsv(205, 75%, 6%)
CMYK	cmyk(75%, 31.3%, 0%, 93.7%)
CIE-LAB	lab(2.73, -1.00, -2.94)
CIE-LCH	lch(2.73, 3.10, 251.26°)
OKLab	oklab(14.37% -0.0098 -0.0141)
OKLCH	oklch(14.37% 0.017 235.2)
XYZ	xyz(0.2632, 0.3025, 0.5346)
Luminance	0.0030 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B10 #100904

analogous

#04100F #040B10 #040510

triadic

#040B10 #10040B #0B1004

tetradic

#040B10 #0F0410 #100904 #051004

square

#040B10 #0F0410 #100904 #051004

split-complementary

#040B10 #100405 #100F04

monochromatic

#061118 #061118 #061118 #102D41 #1C4E72

Accessibility & contrast

On white

19.80

#040B10 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#040B10 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B10

19.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B10	#FFFFFF	#000000	##FFFFFF
##040B10	1.00	19.80	1.06	19.80
#FFFFFF	19.80	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#090B10

Deuteranopia (green-blind)

#070910

Tritanopia (blue-blind)

#010C0D

Achromatopsia (no color)

#0A0A0A

Design tokens & code

CSS

--color: #040b10;
/* rgb */ color: rgb(4, 11, 16);
/* oklch */ color: oklch(14.4% 0.017 235.2);

Tailwind

colors: {
  custom: {
    50: '#484c4e',
    500: '#040b10',
    950: '#000000',
  },
}

SCSS

$custom: #040b10;
$custom-light: #484c4e;
$custom-dark: #000000;

JSON

{
  "hex": "#040b10",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 16
  },
  "hsl": {
    "h": 205,
    "s": 60,
    "l": 3.922
  },
  "oklch": {
    "l": 0.14375,
    "c": 0.01714,
    "h": 235.2
  },
  "luminance": 0.00303
}

Semantic roles & 50–950 ramp

primary

#040B10

secondary

#4F3420

accent

#8745E3

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000101

muted

#777777

Preview Lab

Preview with #040B10

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

Preview Lab → · Contrast checker → · Palette generator →