#040439#040439

#040439 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 17.0% C 0.098 H 269.4°. Best body text is #FFFFFF at 19.42:1 contrast (WCAG AA passes).

Color values

HEX	#040439
RGB	rgb(4, 4, 57)
HSL	hsl(240, 87%, 12%)
HSV	hsv(240, 93%, 22%)
CMYK	cmyk(93%, 93%, 0%, 77.6%)
CIE-LAB	lab(3.69, 18.19, -32.02)
CIE-LCH	lch(3.69, 36.82, 299.60°)
OKLab	oklab(16.99% -0.001 -0.0984)
OKLCH	oklch(16.99% 0.098 269.4)
XYZ	xyz(0.8318, 0.4080, 3.9050)
Luminance	0.0041 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040439 #393904

analogous

#041F39 #040439 #1F0439

triadic

#040439 #390404 #043904

tetradic

#040439 #39041F #393904 #04391F

square

#040439 #39041F #393904 #04391F

split-complementary

#040439 #391F04 #1F3904

monochromatic

#02021D #02021D #040439 #080872 #0C0CAB

Accessibility & contrast

On white

19.42

#040439 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040439 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040439

19.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040439	#FFFFFF	#000000	##FFFFFF
##040439	1.00	19.42	1.08	19.42
#FFFFFF	19.42	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00103A

Deuteranopia (green-blind)

#000A38

Tritanopia (blue-blind)

#00141E

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #040439;
/* rgb */ color: rgb(4, 4, 57);
/* oklch */ color: oklch(17.0% 0.098 269.4);

Tailwind

colors: {
  custom: {
    50: '#4e4770',
    500: '#040439',
    950: '#000000',
  },
}

SCSS

$custom: #040439;
$custom-light: #4e4770;
$custom-dark: #000000;

JSON

{
  "hex": "#040439",
  "rgb": {
    "r": 4,
    "g": 4,
    "b": 57
  },
  "hsl": {
    "h": 240,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.16988,
    "c": 0.09844,
    "h": 269.4
  },
  "luminance": 0.00408
}

Semantic roles & 50–950 ramp

primary

#040439

secondary

#7B7B1E

accent

#FD2BFD

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#020007

muted

#78777A

Preview Lab

Preview with #040439

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

Preview Lab → · Contrast checker → · Palette generator →