#040A1C#040A1C

#040A1C is a very dark, muted blue. Relative luminance 0.003; OKLCH L 15.0% C 0.041 H 264.7°. Best body text is #FFFFFF at 19.71:1 contrast (WCAG AA passes).

Color values

HEX	#040A1C
RGB	rgb(4, 10, 28)
HSL	hsl(225, 75%, 6%)
HSV	hsv(225, 86%, 11%)
CMYK	cmyk(85.7%, 64.3%, 0%, 89%)
CIE-LAB	lab(2.95, 2.36, -11.10)
CIE-LCH	lch(2.95, 11.35, 281.99°)
OKLab	oklab(14.99% -0.0037 -0.0403)
OKLCH	oklch(14.99% 0.041 264.7)
XYZ	xyz(0.3681, 0.3267, 1.1420)
Luminance	0.0033 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A1C #1C1604

analogous

#04161C #040A1C #0A041C

triadic

#040A1C #1C040A #0A1C04

tetradic

#040A1C #1C0416 #1C1604 #041C0A

square

#040A1C #1C0416 #1C1604 #041C0A

split-complementary

#040A1C #1C0A04 #161C04

monochromatic

#040A1B #040A1B #040A1C #0C1D52 #133087

Accessibility & contrast

On white

19.71

#040A1C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#040A1C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A1C

19.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A1C	#FFFFFF	#000000	##FFFFFF
##040A1C	1.00	19.71	1.07	19.71
#FFFFFF	19.71	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#030C1D

Deuteranopia (green-blind)

#010A1C

Tritanopia (blue-blind)

#000E11

Achromatopsia (no color)

#0B0B0B

Design tokens & code

CSS

--color: #040a1c;
/* rgb */ color: rgb(4, 10, 28);
/* oklch */ color: oklch(15.0% 0.041 264.7);

Tailwind

colors: {
  custom: {
    50: '#484b58',
    500: '#040a1c',
    950: '#000000',
  },
}

SCSS

$custom: #040a1c;
$custom-light: #484b58;
$custom-dark: #000000;

JSON

{
  "hex": "#040a1c",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 28
  },
  "hsl": {
    "h": 225,
    "s": 75,
    "l": 6.275
  },
  "oklch": {
    "l": 0.14987,
    "c": 0.0405,
    "h": 264.7
  },
  "luminance": 0.00327
}

Semantic roles & 50–950 ramp

primary

#040A1C

secondary

#5E4E1D

accent

#C336F2

background

#F4F4F5

surface

#E6E7E9

border

#C2C3C5

text

#000103

muted

#777778

Preview Lab

Preview with #040A1C

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

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