#040D3F#040D3F

#040D3F is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 19.6% C 0.095 H 266.7°. Best body text is #FFFFFF at 18.51:1 contrast (WCAG AA passes).

Color values

HEX	#040D3F
RGB	rgb(4, 13, 63)
HSL	hsl(231, 88%, 13%)
HSV	hsv(231, 94%, 25%)
CMYK	cmyk(93.7%, 79.4%, 0%, 75.3%)
CIE-LAB	lab(6.07, 17.64, -32.47)
CIE-LCH	lch(6.07, 36.95, 298.52°)
OKLab	oklab(19.61% -0.0055 -0.095)
OKLCH	oklch(19.61% 0.095 266.7)
XYZ	xyz(1.0909, 0.6724, 4.7740)
Luminance	0.0067 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Navy Blue (survey)

#001146

ΔE00 1.61

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D3F #3F3604

analogous

#042A3F #040D3F #18043F

triadic

#040D3F #3F040D #0D3F04

tetradic

#040D3F #3F042A #3F3604 #043F18

square

#040D3F #3F042A #3F3604 #043F18

split-complementary

#040D3F #3F1804 #2A3F04

monochromatic

#02061D #02061D #040D3F #081979 #0B25B2

Accessibility & contrast

On white

18.51

#040D3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#040D3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D3F

18.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D3F	#FFFFFF	#000000	##FFFFFF
##040D3F	1.00	18.51	1.13	18.51
#FFFFFF	18.51	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001641

Deuteranopia (green-blind)

#00113E

Tritanopia (blue-blind)

#001B24

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #040d3f;
/* rgb */ color: rgb(4, 13, 63);
/* oklch */ color: oklch(19.6% 0.095 266.7);

Tailwind

colors: {
  custom: {
    50: '#514c75',
    500: '#040d3f',
    950: '#000000',
  },
}

SCSS

$custom: #040d3f;
$custom-light: #514c75;
$custom-dark: #000000;

JSON

{
  "hex": "#040d3f",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 63
  },
  "hsl": {
    "h": 230.847,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.19611,
    "c": 0.09517,
    "h": 266.7
  },
  "luminance": 0.00673
}

Semantic roles & 50–950 ramp

primary

#040D3F

secondary

#80711E

accent

#DE2AFE

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#020108

muted

#78777B

Preview Lab

Preview with #040D3F

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

Preview Lab → · Contrast checker → · Palette generator →