#81101B#81101B

#81101B is a dark, vivid red. Relative luminance 0.051; OKLCH L 38.9% C 0.145 H 23.4°. Best body text is #FFFFFF at 10.38:1 contrast (WCAG AA passes).

Color values

HEX	#81101B
RGB	rgb(129, 16, 27)
HSL	hsl(354, 78%, 28%)
HSV	hsv(354, 88%, 51%)
CMYK	cmyk(0%, 87.6%, 79.1%, 49.4%)
CIE-LAB	lab(27.07, 45.89, 26.02)
CIE-LCH	lch(27.07, 52.75, 29.55°)
OKLab	oklab(38.91% 0.1333 0.0577)
OKLCH	oklch(38.91% 0.145 23.4)
XYZ	xyz(9.4375, 5.1184, 1.5277)
Luminance	0.0512 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#81101B #108176

analogous

#811053 #81101B #813D10

triadic

#81101B #1B8110 #101B81

tetradic

#81101B #538110 #108176 #3D1081

square

#81101B #538110 #108176 #3D1081

split-complementary

#81101B #10813D #105381

monochromatic

#1B0306 #4B0910 #81101B #B71726 #E4273A

Accessibility & contrast

On white

10.38

#81101B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#81101B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #81101B

10.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##81101B	#FFFFFF	#000000	##FFFFFF
##81101B	1.00	10.38	2.02	10.38
#FFFFFF	10.38	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#36311A

Deuteranopia (green-blind)

#514816

Tritanopia (blue-blind)

#8F0016

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #81101b;
/* rgb */ color: rgb(129, 16, 27);
/* oklch */ color: oklch(38.9% 0.145 23.4);

Tailwind

colors: {
  custom: {
    50: '#ae5d57',
    500: '#81101b',
    950: '#000000',
  },
}

SCSS

$custom: #81101b;
$custom-light: #ae5d57;
$custom-dark: #000000;

JSON

{
  "hex": "#81101b",
  "rgb": {
    "r": 129,
    "g": 16,
    "b": 27
  },
  "hsl": {
    "h": 354.159,
    "s": 77.931,
    "l": 28.431
  },
  "oklch": {
    "l": 0.38914,
    "c": 0.14525,
    "h": 23.4
  },
  "luminance": 0.05117
}

Semantic roles & 50–950 ramp

primary

#81101B

secondary

#36B7AA

accent

#F4E233

background

#FBF5F5

surface

#F6EAE9

border

#D0C6C5

text

#120503

muted

#817978

Preview Lab

Preview with #81101B

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

Preview Lab → · Contrast checker → · Palette generator →