#040A18#040A18

#040A18 is a very dark, muted blue. Relative luminance 0.003; OKLCH L 14.6% C 0.033 H 261.6°. Best body text is #FFFFFF at 19.78:1 contrast (WCAG AA passes).

Color values

HEX	#040A18
RGB	rgb(4, 10, 24)
HSL	hsl(222, 71%, 5%)
HSV	hsv(222, 83%, 9%)
CMYK	cmyk(83.3%, 58.3%, 0%, 90.6%)
CIE-LAB	lab(2.79, 1.22, -8.16)
CIE-LCH	lch(2.79, 8.25, 278.54°)
OKLab	oklab(14.64% -0.0048 -0.0324)
OKLCH	oklch(14.64% 0.033 261.6)
XYZ	xyz(0.3234, 0.3088, 0.9065)
Luminance	0.0031 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A18 #181204

analogous

#041418 #040A18 #080418

triadic

#040A18 #18040A #0A1804

tetradic

#040A18 #180414 #181204 #041808

square

#040A18 #180414 #181204 #041808

split-complementary

#040A18 #180804 #141804

monochromatic

#040B1A #040B1A #040B1A #0D204C #153681

Accessibility & contrast

On white

19.78

#040A18 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#040A18 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A18

19.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A18	#FFFFFF	#000000	##FFFFFF
##040A18	1.00	19.78	1.06	19.78
#FFFFFF	19.78	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#050B19

Deuteranopia (green-blind)

#030918

Tritanopia (blue-blind)

#000D0F

Achromatopsia (no color)

#0A0A0A

Design tokens & code

CSS

--color: #040a18;
/* rgb */ color: rgb(4, 10, 24);
/* oklch */ color: oklch(14.6% 0.033 261.6);

Tailwind

colors: {
  custom: {
    50: '#484b54',
    500: '#040a18',
    950: '#000000',
  },
}

SCSS

$custom: #040a18;
$custom-light: #484b54;
$custom-dark: #000000;

JSON

{
  "hex": "#040a18",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 24
  },
  "hsl": {
    "h": 222,
    "s": 71.429,
    "l": 5.49
  },
  "oklch": {
    "l": 0.14637,
    "c": 0.03278,
    "h": 261.6
  },
  "luminance": 0.00309
}

Semantic roles & 50–950 ramp

primary

#040A18

secondary

#5A481E

accent

#B83AEE

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000102

muted

#777778

Preview Lab

Preview with #040A18

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

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