#04050B#04050B

#04050B is a very dark, near-neutral blue. Relative luminance 0.002; OKLCH L 11.7% C 0.016 H 273.8°. Best body text is #FFFFFF at 20.35:1 contrast (WCAG AA passes).

Color values

HEX	#04050B
RGB	rgb(4, 5, 11)
HSL	hsl(231, 47%, 3%)
HSV	hsv(231, 64%, 4%)
CMYK	cmyk(63.6%, 54.5%, 0%, 95.7%)
CIE-LAB	lab(1.43, 0.58, -2.37)
CIE-LCH	lch(1.43, 2.44, 283.63°)
OKLab	oklab(11.72% 0.0011 -0.0164)
OKLCH	oklch(11.72% 0.016 273.8)
XYZ	xyz(0.1647, 0.1585, 0.3385)
Luminance	0.0016 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04050B #0B0A04

analogous

#04080B #04050B #06040B

triadic

#04050B #0B0405 #050B04

tetradic

#04050B #0B0408 #0B0A04 #040B06

square

#04050B #0B0408 #0B0A04 #040B06

split-complementary

#04050B #0B0604 #080B04

monochromatic

#080A16 #080A16 #080A16 #141938 #252E65

Accessibility & contrast

On white

20.35

#04050B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.03

#04050B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04050B

20.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04050B	#FFFFFF	#000000	##FFFFFF
##04050B	1.00	20.35	1.03	20.35
#FFFFFF	20.35	1.00	21.00	1.00
#000000	1.03	21.00	1.00	21.00
##FFFFFF	20.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04050B

Deuteranopia (green-blind)

#03050B

Tritanopia (blue-blind)

#030607

Achromatopsia (no color)

#050505

Design tokens & code

CSS

--color: #04050b;
/* rgb */ color: rgb(4, 5, 11);
/* oklch */ color: oklch(11.7% 0.016 273.8);

Tailwind

colors: {
  custom: {
    50: '#48494c',
    500: '#04050b',
    950: '#000000',
  },
}

SCSS

$custom: #04050b;
$custom-light: #48494c;
$custom-dark: #000000;

JSON

{
  "hex": "#04050b",
  "rgb": {
    "r": 4,
    "g": 5,
    "b": 11
  },
  "hsl": {
    "h": 231.429,
    "s": 46.667,
    "l": 2.941
  },
  "oklch": {
    "l": 0.11723,
    "c": 0.0164,
    "h": 273.8
  },
  "luminance": 0.00159
}

Semantic roles & 50–950 ramp

primary

#04050B

secondary

#474224

accent

#C351D6

background

#F4F4F4

surface

#E6E6E7

border

#C2C2C3

text

#000001

muted

#777777

Preview Lab

Preview with #04050B

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

Preview Lab → · Contrast checker → · Palette generator →