#040D2C#040D2C

#040D2C is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.4% C 0.065 H 265.6°. Best body text is #FFFFFF at 19.10:1 contrast (WCAG AA passes).

Color values

HEX	#040D2C
RGB	rgb(4, 13, 44)
HSL	hsl(227, 83%, 9%)
HSV	hsv(227, 91%, 17%)
CMYK	cmyk(90.9%, 70.5%, 0%, 82.7%)
CIE-LAB	lab(4.47, 7.28, -21.11)
CIE-LCH	lch(4.47, 22.33, 289.02°)
OKLab	oklab(17.4% -0.005 -0.0644)
OKLCH	oklch(17.4% 0.065 265.6)
XYZ	xyz(0.6485, 0.4954, 2.4438)
Luminance	0.0050 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.55

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D2C #2C2304

analogous

#04212C #040D2C #0F042C

triadic

#040D2C #2C040D #0D2C04

tetradic

#040D2C #2C0421 #2C2304 #042C0F

square

#040D2C #2C0421 #2C2304 #042C0F

split-complementary

#040D2C #2C0F04 #212C04

monochromatic

#03081C #03081C #040D2C #091E64 #0E2E9C

Accessibility & contrast

On white

19.10

#040D2C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040D2C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D2C

19.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D2C	#FFFFFF	#000000	##FFFFFF
##040D2C	1.00	19.10	1.10	19.10
#FFFFFF	19.10	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00112D

Deuteranopia (green-blind)

#000E2B

Tritanopia (blue-blind)

#00151A

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040d2c;
/* rgb */ color: rgb(4, 13, 44);
/* oklch */ color: oklch(17.4% 0.065 265.6);

Tailwind

colors: {
  custom: {
    50: '#4a4c65',
    500: '#040d2c',
    950: '#000000',
  },
}

SCSS

$custom: #040d2c;
$custom-light: #4a4c65;
$custom-dark: #000000;

JSON

{
  "hex": "#040d2c",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 44
  },
  "hsl": {
    "h": 226.5,
    "s": 83.333,
    "l": 9.412
  },
  "oklch": {
    "l": 0.17401,
    "c": 0.06462,
    "h": 265.6
  },
  "luminance": 0.00496
}

Semantic roles & 50–950 ramp

primary

#040D2C

secondary

#6F5C1D

accent

#CC2EFA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010105

muted

#77777A

Preview Lab

Preview with #040D2C

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

Preview Lab → · Contrast checker → · Palette generator →