#04042B#04042B

#04042B is a very dark, moderate blue. Relative luminance 0.003; OKLCH L 15.0% C 0.078 H 271.8°. Best body text is #FFFFFF at 19.86:1 contrast (WCAG AA passes).

Color values

HEX	#04042B
RGB	rgb(4, 4, 43)
HSL	hsl(240, 83%, 9%)
HSV	hsv(240, 91%, 17%)
CMYK	cmyk(90.7%, 90.7%, 0%, 83.1%)
CIE-LAB	lab(2.59, 10.51, -23.33)
CIE-LCH	lch(2.59, 25.59, 294.25°)
OKLab	oklab(14.96% 0.0025 -0.0781)
OKLCH	oklch(14.96% 0.078 271.8)
XYZ	xyz(0.5294, 0.2870, 2.3125)
Luminance	0.0029 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04042B #2B2B04

analogous

#04182B #04042B #18042B

triadic

#04042B #2B0404 #042B04

tetradic

#04042B #2B0418 #2B2B04 #042B18

square

#04042B #2B0418 #2B2B04 #042B18

split-complementary

#04042B #2B1804 #182B04

monochromatic

#03031C #03031C #04042B #090963 #0E0E9B

Accessibility & contrast

On white

19.86

#04042B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#04042B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04042B

19.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04042B	#FFFFFF	#000000	##FFFFFF
##04042B	1.00	19.86	1.06	19.86
#FFFFFF	19.86	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000B2C

Deuteranopia (green-blind)

#00082A

Tritanopia (blue-blind)

#000F16

Achromatopsia (no color)

#090909

Design tokens & code

CSS

--color: #04042b;
/* rgb */ color: rgb(4, 4, 43);
/* oklch */ color: oklch(15.0% 0.078 271.8);

Tailwind

colors: {
  custom: {
    50: '#494864',
    500: '#04042b',
    950: '#000000',
  },
}

SCSS

$custom: #04042b;
$custom-light: #494864;
$custom-dark: #000000;

JSON

{
  "hex": "#04042b",
  "rgb": {
    "r": 4,
    "g": 4,
    "b": 43
  },
  "hsl": {
    "h": 240,
    "s": 82.979,
    "l": 9.216
  },
  "oklch": {
    "l": 0.14964,
    "c": 0.0781,
    "h": 271.8
  },
  "luminance": 0.00287
}

Semantic roles & 50–950 ramp

primary

#04042B

secondary

#6E6E1D

accent

#F92EF9

background

#F4F4F6

surface

#E7E6EB

border

#C3C2C6

text

#010005

muted

#77777A

Preview Lab

Preview with #04042B

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

Preview Lab → · Contrast checker → · Palette generator →