#04001F#04001F

#04001F is a very dark, moderate blue. Relative luminance 0.001; OKLCH L 11.7% C 0.071 H 279.6°. Best body text is #FFFFFF at 20.49:1 contrast (WCAG AA passes).

Color values

HEX	#04001F
RGB	rgb(4, 0, 31)
HSL	hsl(248, 100%, 6%)
HSV	hsv(248, 100%, 12%)
CMYK	cmyk(87.1%, 100%, 0%, 87.8%)
CIE-LAB	lab(1.13, 7.32, -16.24)
CIE-LCH	lch(1.13, 17.81, 294.28°)
OKLab	oklab(11.68% 0.0118 -0.0699)
OKLCH	oklch(11.68% 0.071 279.6)
XYZ	xyz(0.2973, 0.1247, 1.3045)
Luminance	0.0013 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04001F #1B1F00

analogous

#000B1F #04001F #13001F

triadic

#04001F #1F0400 #001F04

tetradic

#04001F #1F000B #1B1F00 #001F13

square

#04001F #1F000B #1B1F00 #001F13

split-complementary

#04001F #1F1300 #0B1F00

monochromatic

#04001F #04001F #04001F #0C005C #140099

Accessibility & contrast

On white

20.49

#04001F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.02

#04001F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04001F

20.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04001F	#FFFFFF	#000000	##FFFFFF
##04001F	1.00	20.49	1.02	20.49
#FFFFFF	20.49	1.00	21.00	1.00
#000000	1.02	21.00	1.00	21.00
##FFFFFF	20.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000520

Deuteranopia (green-blind)

#00031E

Tritanopia (blue-blind)

#00060D

Achromatopsia (no color)

#040404

Design tokens & code

CSS

--color: #04001f;
/* rgb */ color: rgb(4, 0, 31);
/* oklch */ color: oklch(11.7% 0.071 279.6);

Tailwind

colors: {
  custom: {
    50: '#48475a',
    500: '#04001f',
    950: '#000000',
  },
}

SCSS

$custom: #04001f;
$custom-light: #48475a;
$custom-dark: #000000;

JSON

{
  "hex": "#04001f",
  "rgb": {
    "r": 4,
    "g": 0,
    "b": 31
  },
  "hsl": {
    "h": 247.742,
    "s": 100,
    "l": 6.078
  },
  "oklch": {
    "l": 0.11681,
    "c": 0.07087,
    "h": 279.6
  },
  "luminance": 0.00125
}

Semantic roles & 50–950 ramp

primary

#04001F

secondary

#5D6812

accent

#FF29E3

background

#F4F3F5

surface

#E6E5E9

border

#C2C1C5

text

#000004

muted

#777779

Preview Lab

Preview with #04001F

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

Preview Lab → · Contrast checker → · Palette generator →