#040A31#040A31

#040A31 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.3% C 0.077 H 268.0°. Best body text is #FFFFFF at 19.21:1 contrast (WCAG AA passes).

Color values

HEX	#040A31
RGB	rgb(4, 10, 49)
HSL	hsl(232, 85%, 10%)
HSV	hsv(232, 92%, 19%)
CMYK	cmyk(91.8%, 79.6%, 0%, 80.8%)
CIE-LAB	lab(4.20, 11.11, -25.30)
CIE-LCH	lch(4.20, 27.63, 293.71°)
OKLab	oklab(17.26% -0.0027 -0.0774)
OKLCH	oklch(17.26% 0.077 268)
XYZ	xyz(0.7128, 0.4646, 2.9572)
Luminance	0.0046 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 3.23

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A31 #312B04

analogous

#042031 #040A31 #140431

triadic

#040A31 #31040A #0A3104

tetradic

#040A31 #310420 #312B04 #043114

square

#040A31 #310420 #312B04 #043114

split-complementary

#040A31 #311404 #203104

monochromatic

#02061C #02061C #040A31 #09166A #0D21A2

Accessibility & contrast

On white

19.21

#040A31 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040A31 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A31

19.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A31	#FFFFFF	#000000	##FFFFFF
##040A31	1.00	19.21	1.09	19.21
#FFFFFF	19.21	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001132

Deuteranopia (green-blind)

#000C30

Tritanopia (blue-blind)

#00151C

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040a31;
/* rgb */ color: rgb(4, 10, 49);
/* oklch */ color: oklch(17.3% 0.077 268.0);

Tailwind

colors: {
  custom: {
    50: '#4b4b69',
    500: '#040a31',
    950: '#000000',
  },
}

SCSS

$custom: #040a31;
$custom-light: #4b4b69;
$custom-dark: #000000;

JSON

{
  "hex": "#040a31",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 49
  },
  "hsl": {
    "h": 232,
    "s": 84.906,
    "l": 10.392
  },
  "oklch": {
    "l": 0.17258,
    "c": 0.07749,
    "h": 268
  },
  "luminance": 0.00465
}

Semantic roles & 50–950 ramp

primary

#040A31

secondary

#73681D

accent

#E02DFB

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040A31

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

Preview Lab → · Contrast checker → · Palette generator →