#040939#040939

#040939 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 18.1% C 0.091 H 268.1°. Best body text is #FFFFFF at 19.03:1 contrast (WCAG AA passes).

Color values

HEX	#040939
RGB	rgb(4, 9, 57)
HSL	hsl(234, 87%, 12%)
HSV	hsv(234, 93%, 22%)
CMYK	cmyk(93%, 84.2%, 0%, 77.6%)
CIE-LAB	lab(4.67, 16.15, -30.43)
CIE-LCH	lch(4.67, 34.45, 297.96°)
OKLab	oklab(18.06% -0.0031 -0.0912)
OKLCH	oklch(18.06% 0.091 268.1)
XYZ	xyz(0.8860, 0.5165, 3.9231)
Luminance	0.0052 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Dark Navy

#000435

ΔE00 1.25

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040939 #393404

analogous

#042439 #040939 #1A0439

triadic

#040939 #390409 #093904

tetradic

#040939 #390424 #393404 #04391A

square

#040939 #390424 #393404 #04391A

split-complementary

#040939 #391A04 #243904

monochromatic

#02051D #02051D #040939 #081272 #0C1BAB

Accessibility & contrast

On white

19.03

#040939 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040939 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040939

19.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040939	#FFFFFF	#000000	##FFFFFF
##040939	1.00	19.03	1.10	19.03
#FFFFFF	19.03	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00133A

Deuteranopia (green-blind)

#000D38

Tritanopia (blue-blind)

#001720

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040939;
/* rgb */ color: rgb(4, 9, 57);
/* oklch */ color: oklch(18.1% 0.091 268.1);

Tailwind

colors: {
  custom: {
    50: '#4e4a70',
    500: '#040939',
    950: '#000000',
  },
}

SCSS

$custom: #040939;
$custom-light: #4e4a70;
$custom-dark: #000000;

JSON

{
  "hex": "#040939",
  "rgb": {
    "r": 4,
    "g": 9,
    "b": 57
  },
  "hsl": {
    "h": 234.34,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.18058,
    "c": 0.0913,
    "h": 268.1
  },
  "luminance": 0.00517
}

Semantic roles & 50–950 ramp

primary

#040939

secondary

#7B721E

accent

#E92BFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #040939

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

Preview Lab → · Contrast checker → · Palette generator →