#040539#040539

#040539 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 17.2% C 0.097 H 269.2°. Best body text is #FFFFFF at 19.34:1 contrast (WCAG AA passes).

Color values

HEX	#040539
RGB	rgb(4, 5, 57)
HSL	hsl(239, 87%, 12%)
HSV	hsv(239, 93%, 22%)
CMYK	cmyk(93%, 91.2%, 0%, 77.6%)
CIE-LAB	lab(3.88, 17.79, -31.70)
CIE-LCH	lch(3.88, 36.35, 299.30°)
OKLab	oklab(17.21% -0.0014 -0.0969)
OKLCH	oklch(17.21% 0.097 269.2)
XYZ	xyz(0.8426, 0.4297, 3.9086)
Luminance	0.0043 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040539 #393804

analogous

#042039 #040539 #1E0439

triadic

#040539 #390405 #053904

tetradic

#040539 #390420 #393804 #04391E

square

#040539 #390420 #393804 #04391E

split-complementary

#040539 #391E04 #203904

monochromatic

#02031D #02031D #040539 #080A72 #0C0FAB

Accessibility & contrast

On white

19.34

#040539 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040539 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040539

19.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040539	#FFFFFF	#000000	##FFFFFF
##040539	1.00	19.34	1.09	19.34
#FFFFFF	19.34	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00113A

Deuteranopia (green-blind)

#000B38

Tritanopia (blue-blind)

#00151F

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #040539;
/* rgb */ color: rgb(4, 5, 57);
/* oklch */ color: oklch(17.2% 0.097 269.2);

Tailwind

colors: {
  custom: {
    50: '#4e4870',
    500: '#040539',
    950: '#000000',
  },
}

SCSS

$custom: #040539;
$custom-light: #4e4870;
$custom-dark: #000000;

JSON

{
  "hex": "#040539",
  "rgb": {
    "r": 4,
    "g": 5,
    "b": 57
  },
  "hsl": {
    "h": 238.868,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.17213,
    "c": 0.09693,
    "h": 269.2
  },
  "luminance": 0.0043
}

Semantic roles & 50–950 ramp

primary

#040539

secondary

#7B791E

accent

#F92BFD

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#020007

muted

#78777A

Preview Lab

Preview with #040539

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

Preview Lab → · Contrast checker → · Palette generator →