#04030B#04030B

#04030B is a very dark, muted blue. Relative luminance 0.001; OKLCH L 10.7% C 0.024 H 289.8°. Best body text is #FFFFFF at 20.53:1 contrast (WCAG AA passes).

Color values

HEX	#04030B
RGB	rgb(4, 3, 11)
HSL	hsl(248, 57%, 3%)
HSV	hsv(248, 73%, 4%)
CMYK	cmyk(63.6%, 72.7%, 0%, 95.7%)
CIE-LAB	lab(1.04, 1.38, -2.94)
CIE-LCH	lch(1.04, 3.25, 295.05°)
OKLab	oklab(10.68% 0.0081 -0.0226)
OKLCH	oklch(10.68% 0.024 289.8)
XYZ	xyz(0.1430, 0.1151, 0.3312)
Luminance	0.0011 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04030B #0A0B03

analogous

#03060B #04030B #08030B

triadic

#04030B #0B0403 #030B04

tetradic

#04030B #0B0306 #0A0B03 #030B08

square

#04030B #0B0306 #0A0B03 #030B08

split-complementary

#04030B #0B0803 #060B03

monochromatic

#090718 #090718 #090718 #15103B #271D6B

Accessibility & contrast

On white

20.53

#04030B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.02

#04030B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04030B

20.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04030B	#FFFFFF	#000000	##FFFFFF
##04030B	1.00	20.53	1.02	20.53
#FFFFFF	20.53	1.00	21.00	1.00
#000000	1.02	21.00	1.00	21.00
##FFFFFF	20.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#02040B

Deuteranopia (green-blind)

#02040B

Tritanopia (blue-blind)

#030405

Achromatopsia (no color)

#040404

Design tokens & code

CSS

--color: #04030b;
/* rgb */ color: rgb(4, 3, 11);
/* oklch */ color: oklch(10.7% 0.024 289.8);

Tailwind

colors: {
  custom: {
    50: '#48484c',
    500: '#04030b',
    950: '#000000',
  },
}

SCSS

$custom: #04030b;
$custom-light: #48484c;
$custom-dark: #000000;

JSON

{
  "hex": "#04030b",
  "rgb": {
    "r": 4,
    "g": 3,
    "b": 11
  },
  "hsl": {
    "h": 247.5,
    "s": 57.143,
    "l": 2.745
  },
  "oklch": {
    "l": 0.10675,
    "c": 0.02402,
    "h": 289.8
  },
  "luminance": 0.00115
}

Semantic roles & 50–950 ramp

primary

#04030B

secondary

#454A20

accent

#E047CD

background

#F4F4F4

surface

#E6E6E7

border

#C2C2C3

text

#000001

muted

#777777

Preview Lab

Preview with #04030B

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

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