#040D40#040D40

#040D40 is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 19.7% C 0.097 H 266.7°. Best body text is #FFFFFF at 18.47:1 contrast (WCAG AA passes).

Color values

HEX	#040D40
RGB	rgb(4, 13, 64)
HSL	hsl(231, 88%, 13%)
HSV	hsv(231, 94%, 25%)
CMYK	cmyk(93.8%, 79.7%, 0%, 74.9%)
CIE-LAB	lab(6.18, 18.16, -33.01)
CIE-LCH	lch(6.18, 37.68, 298.82°)
OKLab	oklab(19.74% -0.0056 -0.0965)
OKLCH	oklch(19.74% 0.097 266.7)
XYZ	xyz(1.1191, 0.6837, 4.9225)
Luminance	0.0068 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Navy Blue (survey)

#001146

ΔE00 1.51

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D40 #403704

analogous

#042B40 #040D40 #190440

triadic

#040D40 #40040D #0D4004

tetradic

#040D40 #40042B #403704 #044019

square

#040D40 #40042B #403704 #044019

split-complementary

#040D40 #401904 #2B4004

monochromatic

#02061D #02061D #040D40 #08197A #0B24B3

Accessibility & contrast

On white

18.47

#040D40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.14

#040D40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D40

18.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D40	#FFFFFF	#000000	##FFFFFF
##040D40	1.00	18.47	1.14	18.47
#FFFFFF	18.47	1.00	21.00	1.00
#000000	1.14	21.00	1.00	21.00
##FFFFFF	18.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001742

Deuteranopia (green-blind)

#00113F

Tritanopia (blue-blind)

#001B25

Achromatopsia (no color)

#141414

Design tokens & code

CSS

--color: #040d40;
/* rgb */ color: rgb(4, 13, 64);
/* oklch */ color: oklch(19.7% 0.097 266.7);

Tailwind

colors: {
  custom: {
    50: '#514c75',
    500: '#040d40',
    950: '#000000',
  },
}

SCSS

$custom: #040d40;
$custom-light: #514c75;
$custom-dark: #000000;

JSON

{
  "hex": "#040d40",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 64
  },
  "hsl": {
    "h": 231,
    "s": 88.235,
    "l": 13.333
  },
  "oklch": {
    "l": 0.19736,
    "c": 0.09667,
    "h": 266.7
  },
  "luminance": 0.00684
}

Semantic roles & 50–950 ramp

primary

#040D40

secondary

#81721F

accent

#DE29FE

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#030108

muted

#78777B

Preview Lab

Preview with #040D40

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

Preview Lab → · Contrast checker → · Palette generator →