#040D39#040D39

#040D39 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.9% C 0.086 H 266.6°. Best body text is #FFFFFF at 18.72:1 contrast (WCAG AA passes).

Color values

HEX	#040D39
RGB	rgb(4, 13, 57)
HSL	hsl(230, 87%, 12%)
HSV	hsv(230, 93%, 22%)
CMYK	cmyk(93%, 77.2%, 0%, 77.6%)
CIE-LAB	lab(5.50, 14.35, -29.07)
CIE-LCH	lch(5.50, 32.42, 296.28°)
OKLab	oklab(18.88% -0.005 -0.0858)
OKLCH	oklch(18.88% 0.086 266.6)
XYZ	xyz(0.9323, 0.6090, 3.9385)
Luminance	0.0061 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D39 #393004

analogous

#042839 #040D39 #160439

triadic

#040D39 #39040D #0D3904

tetradic

#040D39 #390428 #393004 #043916

square

#040D39 #390428 #393004 #043916

split-complementary

#040D39 #391604 #283904

monochromatic

#02071D #02071D #040D39 #081A72 #0C27AB

Accessibility & contrast

On white

18.72

#040D39 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#040D39 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D39

18.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D39	#FFFFFF	#000000	##FFFFFF
##040D39	1.00	18.72	1.12	18.72
#FFFFFF	18.72	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00153A

Deuteranopia (green-blind)

#001038

Tritanopia (blue-blind)

#001921

Achromatopsia (no color)

#121212

Design tokens & code

CSS

--color: #040d39;
/* rgb */ color: rgb(4, 13, 57);
/* oklch */ color: oklch(18.9% 0.086 266.6);

Tailwind

colors: {
  custom: {
    50: '#4e4c70',
    500: '#040d39',
    950: '#000000',
  },
}

SCSS

$custom: #040d39;
$custom-light: #4e4c70;
$custom-dark: #000000;

JSON

{
  "hex": "#040d39",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 57
  },
  "hsl": {
    "h": 229.811,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.18878,
    "c": 0.08597,
    "h": 266.6
  },
  "luminance": 0.00609
}

Semantic roles & 50–950 ramp

primary

#040D39

secondary

#7B6B1E

accent

#D92BFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #040D39

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

Preview Lab → · Contrast checker → · Palette generator →