#040000#040000

#040000 is a very dark, muted red. Relative luminance 0.000; OKLCH L 6.7% C 0.027 H 29.2°. Best body text is #FFFFFF at 20.89:1 contrast (WCAG AA passes).

Color values

HEX	#040000
RGB	rgb(4, 0, 0)
HSL	hsl(0, 100%, 1%)
HSV	hsv(0, 100%, 2%)
CMYK	cmyk(0%, 100%, 100%, 98.4%)
CIE-LAB	lab(0.23, 1.05, 0.37)
CIE-LCH	lch(0.23, 1.11, 19.40°)
OKLab	oklab(6.7% 0.024 0.0134)
OKLCH	oklch(6.7% 0.027 29.2)
XYZ	xyz(0.0501, 0.0258, 0.0023)
Luminance	0.0003 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040000 #000404

analogous

#040002 #040000 #040200

triadic

#040000 #000400 #000004

tetradic

#040000 #020400 #000404 #020004

square

#040000 #020400 #000404 #020004

split-complementary

#040000 #000402 #000204

monochromatic

#1F0000 #1F0000 #1F0000 #410000 #7E0000

Accessibility & contrast

On white

20.89

#040000 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.01

#040000 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040000

20.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040000	#FFFFFF	#000000	##FFFFFF
##040000	1.00	20.89	1.01	20.89
#FFFFFF	20.89	1.00	21.00	1.00
#000000	1.01	21.00	1.00	21.00
##FFFFFF	20.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#010000

Deuteranopia (green-blind)

#010100

Tritanopia (blue-blind)

#050000

Achromatopsia (no color)

#010101

Design tokens & code

CSS

--color: #040000;
/* rgb */ color: rgb(4, 0, 0);
/* oklch */ color: oklch(6.7% 0.027 29.2);

Tailwind

colors: {
  custom: {
    50: '#484747',
    500: '#040000',
    950: '#000000',
  },
}

SCSS

$custom: #040000;
$custom-light: #484747;
$custom-dark: #000000;

JSON

{
  "hex": "#040000",
  "rgb": {
    "r": 4,
    "g": 0,
    "b": 0
  },
  "hsl": {
    "h": 0,
    "s": 100,
    "l": 0.784
  },
  "oklch": {
    "l": 0.06699,
    "c": 0.02749,
    "h": 29.2
  },
  "luminance": 0.00026
}

Semantic roles & 50–950 ramp

primary

#040000

secondary

#0E5151

accent

#FFFF29

background

#F4F3F3

surface

#E6E5E5

border

#C2C1C1

text

#000000

muted

#777777

Preview Lab

Preview with #040000

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

Preview Lab → · Contrast checker → · Palette generator →