#040E39#040E39

#040E39 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 19.1% C 0.085 H 266.2°. Best body text is #FFFFFF at 18.63:1 contrast (WCAG AA passes).

Color values

HEX	#040E39
RGB	rgb(4, 14, 57)
HSL	hsl(229, 87%, 12%)
HSV	hsv(229, 93%, 22%)
CMYK	cmyk(93%, 75.4%, 0%, 77.6%)
CIE-LAB	lab(5.74, 13.83, -28.69)
CIE-LCH	lch(5.74, 31.85, 295.74°)
OKLab	oklab(19.1% -0.0056 -0.0844)
OKLCH	oklch(19.1% 0.085 266.2)
XYZ	xyz(0.9454, 0.6352, 3.9429)
Luminance	0.0063 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040E39 #392F04

analogous

#042939 #040E39 #150439

triadic

#040E39 #39040E #0E3904

tetradic

#040E39 #390429 #392F04 #043915

square

#040E39 #390429 #392F04 #043915

split-complementary

#040E39 #391504 #293904

monochromatic

#02071D #02071D #040E39 #081C72 #0C2AAB

Accessibility & contrast

On white

18.63

#040E39 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#040E39 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040E39

18.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040E39	#FFFFFF	#000000	##FFFFFF
##040E39	1.00	18.63	1.13	18.63
#FFFFFF	18.63	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00153A

Deuteranopia (green-blind)

#001038

Tritanopia (blue-blind)

#001A21

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #040e39;
/* rgb */ color: rgb(4, 14, 57);
/* oklch */ color: oklch(19.1% 0.085 266.2);

Tailwind

colors: {
  custom: {
    50: '#4e4c70',
    500: '#040e39',
    950: '#000000',
  },
}

SCSS

$custom: #040e39;
$custom-light: #4e4c70;
$custom-dark: #000000;

JSON

{
  "hex": "#040e39",
  "rgb": {
    "r": 4,
    "g": 14,
    "b": 57
  },
  "hsl": {
    "h": 228.679,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.19098,
    "c": 0.08456,
    "h": 266.2
  },
  "luminance": 0.00635
}

Semantic roles & 50–950 ramp

primary

#040E39

secondary

#7B691E

accent

#D52BFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #040E39

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

Preview Lab → · Contrast checker → · Palette generator →