#040A10#040A10

#040A10 is a very dark, near-neutral cyan. Relative luminance 0.003; OKLCH L 14.0% C 0.018 H 243.2°. Best body text is #FFFFFF at 19.89:1 contrast (WCAG AA passes).

Color values

HEX	#040A10
RGB	rgb(4, 10, 16)
HSL	hsl(210, 60%, 4%)
HSV	hsv(210, 75%, 6%)
CMYK	cmyk(75%, 37.5%, 0%, 93.7%)
CIE-LAB	lab(2.53, -0.59, -3.23)
CIE-LCH	lch(2.53, 3.28, 259.70°)
OKLab	oklab(14.04% -0.008 -0.0159)
OKLCH	oklch(14.04% 0.018 243.2)
XYZ	xyz(0.2521, 0.2803, 0.5309)
Luminance	0.0028 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A10 #100A04

analogous

#041010 #040A10 #040410

triadic

#040A10 #10040A #0A1004

tetradic

#040A10 #100410 #100A04 #041004

square

#040A10 #100410 #100A04 #041004

split-complementary

#040A10 #100404 #101004

monochromatic

#060F18 #060F18 #060F18 #102941 #1C4772

Accessibility & contrast

On white

19.89

#040A10 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#040A10 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A10

19.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A10	#FFFFFF	#000000	##FFFFFF
##040A10	1.00	19.89	1.06	19.89
#FFFFFF	19.89	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#080A10

Deuteranopia (green-blind)

#060910

Tritanopia (blue-blind)

#010B0C

Achromatopsia (no color)

#090909

Design tokens & code

CSS

--color: #040a10;
/* rgb */ color: rgb(4, 10, 16);
/* oklch */ color: oklch(14.0% 0.018 243.2);

Tailwind

colors: {
  custom: {
    50: '#484b4e',
    500: '#040a10',
    950: '#000000',
  },
}

SCSS

$custom: #040a10;
$custom-light: #484b4e;
$custom-dark: #000000;

JSON

{
  "hex": "#040a10",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 16
  },
  "hsl": {
    "h": 210,
    "s": 60,
    "l": 3.922
  },
  "oklch": {
    "l": 0.14041,
    "c": 0.01782,
    "h": 243.2
  },
  "luminance": 0.0028
}

Semantic roles & 50–950 ramp

primary

#040A10

secondary

#4F3820

accent

#9445E3

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000101

muted

#777777

Preview Lab

Preview with #040A10

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

Preview Lab → · Contrast checker → · Palette generator →