#81101C#81101C

#81101C is a dark, vivid red. Relative luminance 0.051; OKLCH L 38.9% C 0.145 H 22.9°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#81101C
RGB	rgb(129, 16, 28)
HSL	hsl(354, 78%, 28%)
HSV	hsv(354, 88%, 51%)
CMYK	cmyk(0%, 87.6%, 78.3%, 49.4%)
CIE-LAB	lab(27.08, 45.93, 25.40)
CIE-LCH	lch(27.08, 52.48, 28.94°)
OKLab	oklab(38.93% 0.1337 0.0566)
OKLCH	oklch(38.93% 0.145 22.9)
XYZ	xyz(9.4493, 5.1231, 1.5897)
Luminance	0.0512 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#81101C #108175

analogous

#811054 #81101C #813C10

triadic

#81101C #1C8110 #101C81

tetradic

#81101C #548110 #108175 #3C1081

square

#81101C #548110 #108175 #3C1081

split-complementary

#81101C #10813C #105481

monochromatic

#1B0306 #4B0910 #81101C #B71728 #E4273B

Accessibility & contrast

On white

10.37

#81101C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#81101C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #81101C

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##81101C	#FFFFFF	#000000	##FFFFFF
##81101C	1.00	10.37	2.02	10.37
#FFFFFF	10.37	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#36311B

Deuteranopia (green-blind)

#514818

Tritanopia (blue-blind)

#8F0016

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #81101c;
/* rgb */ color: rgb(129, 16, 28);
/* oklch */ color: oklch(38.9% 0.145 22.9);

Tailwind

colors: {
  custom: {
    50: '#ae5d58',
    500: '#81101c',
    950: '#000000',
  },
}

SCSS

$custom: #81101c;
$custom-light: #ae5d58;
$custom-dark: #000000;

JSON

{
  "hex": "#81101c",
  "rgb": {
    "r": 129,
    "g": 16,
    "b": 28
  },
  "hsl": {
    "h": 353.628,
    "s": 77.931,
    "l": 28.431
  },
  "oklch": {
    "l": 0.38928,
    "c": 0.14517,
    "h": 22.9
  },
  "luminance": 0.05122
}

Semantic roles & 50–950 ramp

primary

#81101C

secondary

#36B7A9

accent

#F4E033

background

#FBF5F5

surface

#F6EAE9

border

#D0C6C5

text

#120503

muted

#817978

Preview Lab

Preview with #81101C

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

Preview Lab → · Contrast checker → · Palette generator →