#040D31#040D31

#040D31 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.9% C 0.073 H 266.2°. Best body text is #FFFFFF at 18.97:1 contrast (WCAG AA passes).

Color values

HEX	#040D31
RGB	rgb(4, 13, 49)
HSL	hsl(228, 85%, 10%)
HSV	hsv(228, 92%, 19%)
CMYK	cmyk(91.8%, 73.5%, 0%, 80.8%)
CIE-LAB	lab(4.84, 9.81, -24.27)
CIE-LCH	lch(4.84, 26.18, 292.00°)
OKLab	oklab(17.95% -0.0048 -0.0729)
OKLCH	oklch(17.95% 0.073 266.2)
XYZ	xyz(0.7482, 0.5353, 2.9690)
Luminance	0.0053 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.00

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D31 #312804

analogous

#042331 #040D31 #110431

triadic

#040D31 #31040D #0D3104

tetradic

#040D31 #310423 #312804 #043111

square

#040D31 #310423 #312804 #043111

split-complementary

#040D31 #311104 #233104

monochromatic

#02081C #02081C #040D31 #091C6A #0D2BA2

Accessibility & contrast

On white

18.97

#040D31 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#040D31 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D31

18.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D31	#FFFFFF	#000000	##FFFFFF
##040D31	1.00	18.97	1.11	18.97
#FFFFFF	18.97	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001332

Deuteranopia (green-blind)

#000E30

Tritanopia (blue-blind)

#00161D

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040d31;
/* rgb */ color: rgb(4, 13, 49);
/* oklch */ color: oklch(17.9% 0.073 266.2);

Tailwind

colors: {
  custom: {
    50: '#4b4c69',
    500: '#040d31',
    950: '#000000',
  },
}

SCSS

$custom: #040d31;
$custom-light: #4b4c69;
$custom-dark: #000000;

JSON

{
  "hex": "#040d31",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 49
  },
  "hsl": {
    "h": 228,
    "s": 84.906,
    "l": 10.392
  },
  "oklch": {
    "l": 0.17948,
    "c": 0.07308,
    "h": 266.2
  },
  "luminance": 0.00535
}

Semantic roles & 50–950 ramp

primary

#040D31

secondary

#73621D

accent

#D22DFB

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040D31

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

Preview Lab → · Contrast checker → · Palette generator →