#040C39#040C39

#040C39 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.7% C 0.087 H 267.0°. Best body text is #FFFFFF at 18.80:1 contrast (WCAG AA passes).

Color values

HEX	#040C39
RGB	rgb(4, 12, 57)
HSL	hsl(231, 87%, 12%)
HSV	hsv(231, 93%, 22%)
CMYK	cmyk(93%, 78.9%, 0%, 77.6%)
CIE-LAB	lab(5.28, 14.84, -29.44)
CIE-LCH	lch(5.28, 32.97, 296.76°)
OKLab	oklab(18.66% -0.0045 -0.0872)
OKLCH	oklch(18.66% 0.087 267)
XYZ	xyz(0.9198, 0.5841, 3.9344)
Luminance	0.0058 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C39 #393104

analogous

#042739 #040C39 #170439

triadic

#040C39 #39040C #0C3904

tetradic

#040C39 #390427 #393104 #043917

square

#040C39 #390427 #393104 #043917

split-complementary

#040C39 #391704 #273904

monochromatic

#02061D #02061D #040C39 #081872 #0C24AB

Accessibility & contrast

On white

18.80

#040C39 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#040C39 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C39

18.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C39	#FFFFFF	#000000	##FFFFFF
##040C39	1.00	18.80	1.12	18.80
#FFFFFF	18.80	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00143A

Deuteranopia (green-blind)

#000F38

Tritanopia (blue-blind)

#001821

Achromatopsia (no color)

#121212

Design tokens & code

CSS

--color: #040c39;
/* rgb */ color: rgb(4, 12, 57);
/* oklch */ color: oklch(18.7% 0.087 267.0);

Tailwind

colors: {
  custom: {
    50: '#4e4b70',
    500: '#040c39',
    950: '#000000',
  },
}

SCSS

$custom: #040c39;
$custom-light: #4e4b70;
$custom-dark: #000000;

JSON

{
  "hex": "#040c39",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 57
  },
  "hsl": {
    "h": 230.943,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.18664,
    "c": 0.08735,
    "h": 267
  },
  "luminance": 0.00584
}

Semantic roles & 50–950 ramp

primary

#040C39

secondary

#7B6D1E

accent

#DD2BFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #040C39

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

Preview Lab → · Contrast checker → · Palette generator →