#04043B#04043B

#04043B is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 17.3% C 0.101 H 269.1°. Best body text is #FFFFFF at 19.34:1 contrast (WCAG AA passes).

Color values

HEX	#04043B
RGB	rgb(4, 4, 59)
HSL	hsl(240, 87%, 12%)
HSV	hsv(240, 93%, 23%)
CMYK	cmyk(93.2%, 93.2%, 0%, 76.9%)
CIE-LAB	lab(3.87, 19.45, -33.17)
CIE-LCH	lch(3.87, 38.46, 300.39°)
OKLab	oklab(17.29% -0.0015 -0.1012)
OKLCH	oklch(17.29% 0.101 269.1)
XYZ	xyz(0.8826, 0.4283, 4.1730)
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

#04043B #3B3B04

analogous

#04203B #04043B #20043B

triadic

#04043B #3B0404 #043B04

tetradic

#04043B #3B0420 #3B3B04 #043B20

square

#04043B #3B0420 #3B3B04 #043B20

split-complementary

#04043B #3B2004 #203B04

monochromatic

#02021D #02021D #04043B #080874 #0C0CAE

Accessibility & contrast

On white

19.34

#04043B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#04043B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04043B

19.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04043B	#FFFFFF	#000000	##FFFFFF
##04043B	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)

#00113D

Deuteranopia (green-blind)

#000B3A

Tritanopia (blue-blind)

#001520

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #04043b;
/* rgb */ color: rgb(4, 4, 59);
/* oklch */ color: oklch(17.3% 0.101 269.1);

Tailwind

colors: {
  custom: {
    50: '#4f4772',
    500: '#04043b',
    950: '#000000',
  },
}

SCSS

$custom: #04043b;
$custom-light: #4f4772;
$custom-dark: #000000;

JSON

{
  "hex": "#04043b",
  "rgb": {
    "r": 4,
    "g": 4,
    "b": 59
  },
  "hsl": {
    "h": 240,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.17285,
    "c": 0.1012,
    "h": 269.1
  },
  "luminance": 0.00428
}

Semantic roles & 50–950 ramp

primary

#04043B

secondary

#7D7D1E

accent

#FD2AFD

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#020008

muted

#78777B

Preview Lab

Preview with #04043B

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

Preview Lab → · Contrast checker → · Palette generator →