#040A13#040A13

#040A13 is a very dark, muted blue. Relative luminance 0.003; OKLCH L 14.2% C 0.023 H 253.4°. Best body text is #FFFFFF at 19.85:1 contrast (WCAG AA passes).

Color values

HEX	#040A13
RGB	rgb(4, 10, 19)
HSL	hsl(216, 65%, 5%)
HSV	hsv(216, 79%, 7%)
CMYK	cmyk(78.9%, 47.4%, 0%, 92.5%)
CIE-LAB	lab(2.62, 0.02, -4.89)
CIE-LCH	lch(2.62, 4.89, 270.27°)
OKLab	oklab(14.25% -0.0066 -0.0222)
OKLCH	oklch(14.25% 0.023 253.4)
XYZ	xyz(0.2761, 0.2899, 0.6574)
Luminance	0.0029 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A13 #130D04

analogous

#041213 #040A13 #060413

triadic

#040A13 #13040A #0A1304

tetradic

#040A13 #130412 #130D04 #041306

square

#040A13 #130412 #130D04 #041306

split-complementary

#040A13 #130604 #121304

monochromatic

#050D19 #050D19 #050D19 #0F2546 #193F78

Accessibility & contrast

On white

19.85

#040A13 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#040A13 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A13

19.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A13	#FFFFFF	#000000	##FFFFFF
##040A13	1.00	19.85	1.06	19.85
#FFFFFF	19.85	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#070A13

Deuteranopia (green-blind)

#050913

Tritanopia (blue-blind)

#000C0D

Achromatopsia (no color)

#0A0A0A

Design tokens & code

CSS

--color: #040a13;
/* rgb */ color: rgb(4, 10, 19);
/* oklch */ color: oklch(14.2% 0.023 253.4);

Tailwind

colors: {
  custom: {
    50: '#484b50',
    500: '#040a13',
    950: '#000000',
  },
}

SCSS

$custom: #040a13;
$custom-light: #484b50;
$custom-dark: #000000;

JSON

{
  "hex": "#040a13",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 19
  },
  "hsl": {
    "h": 216,
    "s": 65.217,
    "l": 4.51
  },
  "oklch": {
    "l": 0.14247,
    "c": 0.02317,
    "h": 253.4
  },
  "luminance": 0.0029
}

Semantic roles & 50–950 ramp

primary

#040A13

secondary

#543F1F

accent

#A540E8

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000102

muted

#777778

Preview Lab

Preview with #040A13

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

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