#040C37#040C37

#040C37 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.4% C 0.084 H 267.0°. Best body text is #FFFFFF at 18.87:1 contrast (WCAG AA passes).

Color values

HEX	#040C37
RGB	rgb(4, 12, 55)
HSL	hsl(231, 86%, 12%)
HSV	hsv(231, 93%, 22%)
CMYK	cmyk(92.7%, 78.2%, 0%, 78.4%)
CIE-LAB	lab(5.10, 13.68, -28.27)
CIE-LCH	lch(5.10, 31.40, 295.83°)
OKLab	oklab(18.42% -0.0043 -0.0841)
OKLCH	oklch(18.42% 0.084 267)
XYZ	xyz(0.8709, 0.5645, 3.6767)
Luminance	0.0056 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C37 #372F04

analogous

#042637 #040C37 #160437

triadic

#040C37 #37040C #0C3704

tetradic

#040C37 #370426 #372F04 #043716

square

#040C37 #370426 #372F04 #043716

split-complementary

#040C37 #371604 #263704

monochromatic

#02061D #02061D #040C37 #081870 #0C25A9

Accessibility & contrast

On white

18.87

#040C37 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#040C37 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C37

18.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C37	#FFFFFF	#000000	##FFFFFF
##040C37	1.00	18.87	1.11	18.87
#FFFFFF	18.87	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001438

Deuteranopia (green-blind)

#000F36

Tritanopia (blue-blind)

#001820

Achromatopsia (no color)

#111111

Design tokens & code

CSS

--color: #040c37;
/* rgb */ color: rgb(4, 12, 55);
/* oklch */ color: oklch(18.4% 0.084 267.0);

Tailwind

colors: {
  custom: {
    50: '#4d4b6e',
    500: '#040c37',
    950: '#000000',
  },
}

SCSS

$custom: #040c37;
$custom-light: #4d4b6e;
$custom-dark: #000000;

JSON

{
  "hex": "#040c37",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 55
  },
  "hsl": {
    "h": 230.588,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.18421,
    "c": 0.08422,
    "h": 267
  },
  "luminance": 0.00565
}

Semantic roles & 50–950 ramp

primary

#040C37

secondary

#796B1E

accent

#DC2BFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #040C37

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

Preview Lab → · Contrast checker → · Palette generator →