#040A34#040A34

#040A34 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.6% C 0.082 H 267.9°. Best body text is #FFFFFF at 19.12:1 contrast (WCAG AA passes).

Color values

HEX	#040A34
RGB	rgb(4, 10, 52)
HSL	hsl(233, 86%, 11%)
HSV	hsv(233, 92%, 20%)
CMYK	cmyk(92.3%, 80.8%, 0%, 79.6%)
CIE-LAB	lab(4.43, 12.77, -27.14)
CIE-LCH	lch(4.43, 30.00, 295.20°)
OKLab	oklab(17.63% -0.003 -0.0822)
OKLCH	oklch(17.63% 0.082 267.9)
XYZ	xyz(0.7782, 0.4907, 3.3019)
Luminance	0.0049 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A34 #342E04

analogous

#042234 #040A34 #160434

triadic

#040A34 #34040A #0A3404

tetradic

#040A34 #340422 #342E04 #043416

square

#040A34 #340422 #342E04 #043416

split-complementary

#040A34 #341604 #223404

monochromatic

#02051C #02051C #040A34 #08156D #0D20A6

Accessibility & contrast

On white

19.12

#040A34 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040A34 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A34

19.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A34	#FFFFFF	#000000	##FFFFFF
##040A34	1.00	19.12	1.10	19.12
#FFFFFF	19.12	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001235

Deuteranopia (green-blind)

#000D33

Tritanopia (blue-blind)

#00161D

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040a34;
/* rgb */ color: rgb(4, 10, 52);
/* oklch */ color: oklch(17.6% 0.082 267.9);

Tailwind

colors: {
  custom: {
    50: '#4c4b6c',
    500: '#040a34',
    950: '#000000',
  },
}

SCSS

$custom: #040a34;
$custom-light: #4c4b6c;
$custom-dark: #000000;

JSON

{
  "hex": "#040a34",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 52
  },
  "hsl": {
    "h": 232.5,
    "s": 85.714,
    "l": 10.98
  },
  "oklch": {
    "l": 0.17626,
    "c": 0.08227,
    "h": 267.9
  },
  "luminance": 0.00491
}

Semantic roles & 50–950 ramp

primary

#040A34

secondary

#766B1E

accent

#E22CFC

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010107

muted

#77777A

Preview Lab

Preview with #040A34

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

Preview Lab → · Contrast checker → · Palette generator →