#040D33#040D33

#040D33 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.2% C 0.076 H 266.4°. Best body text is #FFFFFF at 18.91:1 contrast (WCAG AA passes).

Color values

HEX	#040D33
RGB	rgb(4, 13, 51)
HSL	hsl(229, 85%, 11%)
HSV	hsv(229, 92%, 20%)
CMYK	cmyk(92.2%, 74.5%, 0%, 80%)
CIE-LAB	lab(4.99, 10.90, -25.50)
CIE-LCH	lch(4.99, 27.74, 293.14°)
OKLab	oklab(18.18% -0.0048 -0.0762)
OKLCH	oklch(18.18% 0.076 266.4)
XYZ	xyz(0.7913, 0.5526, 3.1963)
Luminance	0.0055 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 3.44

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D33 #332A04

analogous

#042433 #040D33 #120433

triadic

#040D33 #33040D #0D3304

tetradic

#040D33 #330424 #332A04 #043312

square

#040D33 #330424 #332A04 #043312

split-complementary

#040D33 #331204 #243304

monochromatic

#02071C #02071C #040D33 #081B6C #0D2AA4

Accessibility & contrast

On white

18.91

#040D33 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#040D33 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D33

18.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D33	#FFFFFF	#000000	##FFFFFF
##040D33	1.00	18.91	1.11	18.91
#FFFFFF	18.91	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001334

Deuteranopia (green-blind)

#000F32

Tritanopia (blue-blind)

#00171E

Achromatopsia (no color)

#111111

Design tokens & code

CSS

--color: #040d33;
/* rgb */ color: rgb(4, 13, 51);
/* oklch */ color: oklch(18.2% 0.076 266.4);

Tailwind

colors: {
  custom: {
    50: '#4c4c6b',
    500: '#040d33',
    950: '#000000',
  },
}

SCSS

$custom: #040d33;
$custom-light: #4c4c6b;
$custom-dark: #000000;

JSON

{
  "hex": "#040d33",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 51
  },
  "hsl": {
    "h": 228.511,
    "s": 85.455,
    "l": 10.784
  },
  "oklch": {
    "l": 0.18175,
    "c": 0.07637,
    "h": 266.4
  },
  "luminance": 0.00553
}

Semantic roles & 50–950 ramp

primary

#040D33

secondary

#75641D

accent

#D42CFC

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040D33

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

Preview Lab → · Contrast checker → · Palette generator →