#040E37#040E37

#040E37 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.9% C 0.081 H 266.1°. Best body text is #FFFFFF at 18.70:1 contrast (WCAG AA passes).

Color values

HEX	#040E37
RGB	rgb(4, 14, 55)
HSL	hsl(228, 86%, 12%)
HSV	hsv(228, 93%, 22%)
CMYK	cmyk(92.7%, 74.5%, 0%, 78.4%)
CIE-LAB	lab(5.56, 12.71, -27.52)
CIE-LCH	lch(5.56, 30.31, 294.79°)
OKLab	oklab(18.87% -0.0055 -0.0812)
OKLCH	oklch(18.87% 0.081 266.1)
XYZ	xyz(0.8965, 0.6156, 3.6853)
Luminance	0.0062 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 2.78

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040E37 #372D04

analogous

#042837 #040E37 #140437

triadic

#040E37 #37040E #0E3704

tetradic

#040E37 #370428 #372D04 #043714

square

#040E37 #370428 #372D04 #043714

split-complementary

#040E37 #371404 #283704

monochromatic

#02071D #02071D #040E37 #081D70 #0C2BA9

Accessibility & contrast

On white

18.70

#040E37 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#040E37 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040E37

18.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040E37	#FFFFFF	#000000	##FFFFFF
##040E37	1.00	18.70	1.12	18.70
#FFFFFF	18.70	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001538

Deuteranopia (green-blind)

#001036

Tritanopia (blue-blind)

#001920

Achromatopsia (no color)

#121212

Design tokens & code

CSS

--color: #040e37;
/* rgb */ color: rgb(4, 14, 55);
/* oklch */ color: oklch(18.9% 0.081 266.1);

Tailwind

colors: {
  custom: {
    50: '#4e4c6e',
    500: '#040e37',
    950: '#000000',
  },
}

SCSS

$custom: #040e37;
$custom-light: #4e4c6e;
$custom-dark: #000000;

JSON

{
  "hex": "#040e37",
  "rgb": {
    "r": 4,
    "g": 14,
    "b": 55
  },
  "hsl": {
    "h": 228.235,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.18866,
    "c": 0.08137,
    "h": 266.1
  },
  "luminance": 0.00616
}

Semantic roles & 50–950 ramp

primary

#040E37

secondary

#79671E

accent

#D42BFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #040E37

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

Preview Lab → · Contrast checker → · Palette generator →