#040E3B#040E3B

#040E3B is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 19.3% C 0.088 H 266.3°. Best body text is #FFFFFF at 18.56:1 contrast (WCAG AA passes).

Color values

HEX	#040E3B
RGB	rgb(4, 14, 59)
HSL	hsl(229, 87%, 12%)
HSV	hsv(229, 93%, 23%)
CMYK	cmyk(93.2%, 76.3%, 0%, 76.9%)
CIE-LAB	lab(5.92, 14.93, -29.84)
CIE-LCH	lch(5.92, 33.37, 296.59°)
OKLab	oklab(19.33% -0.0057 -0.0875)
OKLCH	oklch(19.33% 0.088 266.3)
XYZ	xyz(0.9962, 0.6555, 4.2108)
Luminance	0.0066 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040E3B #3B3104

analogous

#042A3B #040E3B #16043B

triadic

#040E3B #3B040E #0E3B04

tetradic

#040E3B #3B042A #3B3104 #043B16

square

#040E3B #3B042A #3B3104 #043B16

split-complementary

#040E3B #3B1604 #2A3B04

monochromatic

#02071D #02071D #040E3B #081C74 #0C29AE

Accessibility & contrast

On white

18.56

#040E3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#040E3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040E3B

18.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040E3B	#FFFFFF	#000000	##FFFFFF
##040E3B	1.00	18.56	1.13	18.56
#FFFFFF	18.56	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00163C

Deuteranopia (green-blind)

#00103A

Tritanopia (blue-blind)

#001A22

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #040e3b;
/* rgb */ color: rgb(4, 14, 59);
/* oklch */ color: oklch(19.3% 0.088 266.3);

Tailwind

colors: {
  custom: {
    50: '#4f4c71',
    500: '#040e3b',
    950: '#000000',
  },
}

SCSS

$custom: #040e3b;
$custom-light: #4f4c71;
$custom-dark: #000000;

JSON

{
  "hex": "#040e3b",
  "rgb": {
    "r": 4,
    "g": 14,
    "b": 59
  },
  "hsl": {
    "h": 229.091,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.19334,
    "c": 0.0877,
    "h": 266.3
  },
  "luminance": 0.00656
}

Semantic roles & 50–950 ramp

primary

#040E3B

secondary

#7D6C1E

accent

#D72AFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020108

muted

#78777B

Preview Lab

Preview with #040E3B

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

Preview Lab → · Contrast checker → · Palette generator →