#040D3A#040D3A

#040D3A is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 19.0% C 0.088 H 266.7°. Best body text is #FFFFFF at 18.69:1 contrast (WCAG AA passes).

Color values

HEX	#040D3A
RGB	rgb(4, 13, 58)
HSL	hsl(230, 87%, 12%)
HSV	hsv(230, 93%, 23%)
CMYK	cmyk(93.1%, 77.6%, 0%, 77.3%)
CIE-LAB	lab(5.59, 14.92, -29.65)
CIE-LCH	lch(5.59, 33.19, 296.71°)
OKLab	oklab(19% -0.0051 -0.0874)
OKLCH	oklch(19% 0.088 266.7)
XYZ	xyz(0.9574, 0.6190, 4.0712)
Luminance	0.0062 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D3A #3A3104

analogous

#04283A #040D3A #16043A

triadic

#040D3A #3A040D #0D3A04

tetradic

#040D3A #3A0428 #3A3104 #043A16

square

#040D3A #3A0428 #3A3104 #043A16

split-complementary

#040D3A #3A1604 #283A04

monochromatic

#02061D #02061D #040D3A #081A73 #0C27AD

Accessibility & contrast

On white

18.69

#040D3A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#040D3A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D3A

18.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D3A	#FFFFFF	#000000	##FFFFFF
##040D3A	1.00	18.69	1.12	18.69
#FFFFFF	18.69	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00153B

Deuteranopia (green-blind)

#001039

Tritanopia (blue-blind)

#001922

Achromatopsia (no color)

#121212

Design tokens & code

CSS

--color: #040d3a;
/* rgb */ color: rgb(4, 13, 58);
/* oklch */ color: oklch(19.0% 0.088 266.7);

Tailwind

colors: {
  custom: {
    50: '#4f4c71',
    500: '#040d3a',
    950: '#000000',
  },
}

SCSS

$custom: #040d3a;
$custom-light: #4f4c71;
$custom-dark: #000000;

JSON

{
  "hex": "#040d3a",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 58
  },
  "hsl": {
    "h": 230,
    "s": 87.097,
    "l": 12.157
  },
  "oklch": {
    "l": 0.18998,
    "c": 0.08753,
    "h": 266.7
  },
  "luminance": 0.00619
}

Semantic roles & 50–950 ramp

primary

#040D3A

secondary

#7C6C1E

accent

#DA2BFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #040D3A

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

Preview Lab → · Contrast checker → · Palette generator →