#040C3A#040C3A

#040C3A is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.8% C 0.089 H 267.0°. Best body text is #FFFFFF at 18.77:1 contrast (WCAG AA passes).

Color values

HEX	#040C3A
RGB	rgb(4, 12, 58)
HSL	hsl(231, 87%, 12%)
HSV	hsv(231, 93%, 23%)
CMYK	cmyk(93.1%, 79.3%, 0%, 77.3%)
CIE-LAB	lab(5.37, 15.42, -30.02)
CIE-LCH	lch(5.37, 33.74, 297.19°)
OKLab	oklab(18.79% -0.0046 -0.0888)
OKLCH	oklch(18.79% 0.089 267)
XYZ	xyz(0.9450, 0.5941, 4.0670)
Luminance	0.0059 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C3A #3A3204

analogous

#04273A #040C3A #17043A

triadic

#040C3A #3A040C #0C3A04

tetradic

#040C3A #3A0427 #3A3204 #043A17

square

#040C3A #3A0427 #3A3204 #043A17

split-complementary

#040C3A #3A1704 #273A04

monochromatic

#02061D #02061D #040C3A #081873 #0C24AD

Accessibility & contrast

On white

18.77

#040C3A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#040C3A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C3A

18.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C3A	#FFFFFF	#000000	##FFFFFF
##040C3A	1.00	18.77	1.12	18.77
#FFFFFF	18.77	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00143B

Deuteranopia (green-blind)

#000F39

Tritanopia (blue-blind)

#001921

Achromatopsia (no color)

#121212

Design tokens & code

CSS

--color: #040c3a;
/* rgb */ color: rgb(4, 12, 58);
/* oklch */ color: oklch(18.8% 0.089 267.0);

Tailwind

colors: {
  custom: {
    50: '#4f4b71',
    500: '#040c3a',
    950: '#000000',
  },
}

SCSS

$custom: #040c3a;
$custom-light: #4f4b71;
$custom-dark: #000000;

JSON

{
  "hex": "#040c3a",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 58
  },
  "hsl": {
    "h": 231.111,
    "s": 87.097,
    "l": 12.157
  },
  "oklch": {
    "l": 0.18787,
    "c": 0.08889,
    "h": 267
  },
  "luminance": 0.00594
}

Semantic roles & 50–950 ramp

primary

#040C3A

secondary

#7C6E1E

accent

#DE2BFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #040C3A

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

Preview Lab → · Contrast checker → · Palette generator →