#040F31#040F31

#040F31 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.4% C 0.070 H 264.8°. Best body text is #FFFFFF at 18.79:1 contrast (WCAG AA passes).

Color values

HEX	#040F31
RGB	rgb(4, 15, 49)
HSL	hsl(225, 85%, 10%)
HSV	hsv(225, 92%, 19%)
CMYK	cmyk(91.8%, 69.4%, 0%, 80.8%)
CIE-LAB	lab(5.32, 8.81, -23.50)
CIE-LCH	lch(5.32, 25.10, 290.56°)
OKLab	oklab(18.44% -0.0064 -0.0697)
OKLCH	oklch(18.44% 0.07 264.8)
XYZ	xyz(0.7751, 0.5891, 2.9780)
Luminance	0.0059 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.60

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040F31 #312604

analogous

#042531 #040F31 #0F0431

triadic

#040F31 #31040F #0F3104

tetradic

#040F31 #310425 #312604 #04310F

square

#040F31 #310425 #312604 #04310F

split-complementary

#040F31 #310F04 #253104

monochromatic

#02091C #02091C #040F31 #09206A #0D32A2

Accessibility & contrast

On white

18.79

#040F31 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#040F31 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040F31

18.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040F31	#FFFFFF	#000000	##FFFFFF
##040F31	1.00	18.79	1.12	18.79
#FFFFFF	18.79	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001432

Deuteranopia (green-blind)

#001030

Tritanopia (blue-blind)

#00181E

Achromatopsia (no color)

#121212

Design tokens & code

CSS

--color: #040f31;
/* rgb */ color: rgb(4, 15, 49);
/* oklch */ color: oklch(18.4% 0.070 264.8);

Tailwind

colors: {
  custom: {
    50: '#4b4d69',
    500: '#040f31',
    950: '#000000',
  },
}

SCSS

$custom: #040f31;
$custom-light: #4b4d69;
$custom-dark: #000000;

JSON

{
  "hex": "#040f31",
  "rgb": {
    "r": 4,
    "g": 15,
    "b": 49
  },
  "hsl": {
    "h": 225.333,
    "s": 84.906,
    "l": 10.392
  },
  "oklch": {
    "l": 0.1844,
    "c": 0.07002,
    "h": 264.8
  },
  "luminance": 0.00589
}

Semantic roles & 50–950 ramp

primary

#040F31

secondary

#735E1D

accent

#C92DFB

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040F31

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

Preview Lab → · Contrast checker → · Palette generator →