#040339#040339

#040339 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.8% C 0.100 H 269.6°. Best body text is #FFFFFF at 19.49:1 contrast (WCAG AA passes).

Color values

HEX	#040339
RGB	rgb(4, 3, 57)
HSL	hsl(241, 90%, 12%)
HSV	hsv(241, 95%, 22%)
CMYK	cmyk(93%, 94.7%, 0%, 77.6%)
CIE-LAB	lab(3.49, 18.59, -32.33)
CIE-LCH	lch(3.49, 37.30, 299.90°)
OKLab	oklab(16.76% -0.0007 -0.1)
OKLCH	oklch(16.76% 0.1 269.6)
XYZ	xyz(0.8209, 0.3862, 3.9014)
Luminance	0.0039 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040339 #383903

analogous

#031D39 #040339 #1F0339

triadic

#040339 #390403 #033904

tetradic

#040339 #39031D #383903 #03391F

square

#040339 #39031D #383903 #03391F

split-complementary

#040339 #391F03 #1D3903

monochromatic

#02021D #02021D #040339 #080673 #0C09AD

Accessibility & contrast

On white

19.49

#040339 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040339 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040339

19.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040339	#FFFFFF	#000000	##FFFFFF
##040339	1.00	19.49	1.08	19.49
#FFFFFF	19.49	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000F3A

Deuteranopia (green-blind)

#000A38

Tritanopia (blue-blind)

#00141E

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #040339;
/* rgb */ color: rgb(4, 3, 57);
/* oklch */ color: oklch(16.8% 0.100 269.6);

Tailwind

colors: {
  custom: {
    50: '#4e4770',
    500: '#040339',
    950: '#000000',
  },
}

SCSS

$custom: #040339;
$custom-light: #4e4770;
$custom-dark: #000000;

JSON

{
  "hex": "#040339",
  "rgb": {
    "r": 4,
    "g": 3,
    "b": 57
  },
  "hsl": {
    "h": 241.111,
    "s": 90,
    "l": 11.765
  },
  "oklch": {
    "l": 0.16758,
    "c": 0.09999,
    "h": 269.6
  },
  "luminance": 0.00386
}

Semantic roles & 50–950 ramp

primary

#040339

secondary

#7A7C1C

accent

#FF29FB

background

#F4F3F6

surface

#E7E5EC

border

#C3C1C7

text

#020007

muted

#78777A

Preview Lab

Preview with #040339

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

Preview Lab → · Contrast checker → · Palette generator →