#81131B#81131B

#81131B is a dark, vivid red. Relative luminance 0.052; OKLCH L 39.1% C 0.143 H 24.0°. Best body text is #FFFFFF at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#81131B
RGB	rgb(129, 19, 27)
HSL	hsl(356, 74%, 29%)
HSV	hsv(356, 85%, 51%)
CMYK	cmyk(0%, 85.3%, 79.1%, 49.4%)
CIE-LAB	lab(27.33, 45.13, 26.31)
CIE-LCH	lch(27.33, 52.24, 30.24°)
OKLab	oklab(39.11% 0.1309 0.0583)
OKLCH	oklch(39.11% 0.143 24)
XYZ	xyz(9.4851, 5.2135, 1.5436)
Luminance	0.0521 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#81131B #138179

analogous

#811352 #81131B #814213

triadic

#81131B #1B8113 #131B81

tetradic

#81131B #528113 #138179 #421381

square

#81131B #528113 #138179 #421381

split-complementary

#81131B #138142 #135281

monochromatic

#1B0406 #4C0B10 #81131B #B61B26 #E02E3B

Accessibility & contrast

On white

10.28

#81131B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#81131B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #81131B

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##81131B	#FFFFFF	#000000	##FFFFFF
##81131B	1.00	10.28	2.04	10.28
#FFFFFF	10.28	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#37321A

Deuteranopia (green-blind)

#524917

Tritanopia (blue-blind)

#8F0018

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #81131b;
/* rgb */ color: rgb(129, 19, 27);
/* oklch */ color: oklch(39.1% 0.143 24.0);

Tailwind

colors: {
  custom: {
    50: '#ae5e57',
    500: '#81131b',
    950: '#000000',
  },
}

SCSS

$custom: #81131b;
$custom-light: #ae5e57;
$custom-dark: #000000;

JSON

{
  "hex": "#81131b",
  "rgb": {
    "r": 129,
    "g": 19,
    "b": 27
  },
  "hsl": {
    "h": 355.636,
    "s": 74.324,
    "l": 29.02
  },
  "oklch": {
    "l": 0.3911,
    "c": 0.14331,
    "h": 24
  },
  "luminance": 0.05212
}

Semantic roles & 50–950 ramp

primary

#81131B

secondary

#3AB6AD

accent

#F1E337

background

#FBF5F5

surface

#F6EAE9

border

#D0C6C5

text

#120503

muted

#817978

Preview Lab

Preview with #81131B

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

Preview Lab → · Contrast checker → · Palette generator →