#831021#831021

#831021 is a dark, vivid red. Relative luminance 0.053; OKLCH L 39.4% C 0.147 H 20.8°. Best body text is #FFFFFF at 10.19:1 contrast (WCAG AA passes).

Color values

HEX	#831021
RGB	rgb(131, 16, 33)
HSL	hsl(351, 78%, 29%)
HSV	hsv(351, 88%, 51%)
CMYK	cmyk(0%, 87.8%, 74.8%, 48.6%)
CIE-LAB	lab(27.59, 46.73, 22.87)
CIE-LCH	lch(27.59, 52.02, 26.08°)
OKLab	oklab(39.4% 0.1372 0.0522)
OKLCH	oklch(39.4% 0.147 20.8)
XYZ	xyz(9.8210, 5.3073, 1.9458)
Luminance	0.0531 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#831021 #108372

analogous

#83105B #831021 #833910

triadic

#831021 #218310 #102183

tetradic

#831021 #5B8310 #108372 #391083

square

#831021 #5B8310 #108372 #391083

split-complementary

#831021 #108339 #105B83

monochromatic

#1B0307 #4C0913 #831021 #BA172F #E52944

Accessibility & contrast

On white

10.19

#831021 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#831021 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #831021

10.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##831021	#FFFFFF	#000000	##FFFFFF
##831021	1.00	10.19	2.06	10.19
#FFFFFF	10.19	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#363221

Deuteranopia (green-blind)

#524A1D

Tritanopia (blue-blind)

#910018

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #831021;
/* rgb */ color: rgb(131, 16, 33);
/* oklch */ color: oklch(39.4% 0.147 20.8);

Tailwind

colors: {
  custom: {
    50: '#af5e5c',
    500: '#831021',
    950: '#000000',
  },
}

SCSS

$custom: #831021;
$custom-light: #af5e5c;
$custom-dark: #000000;

JSON

{
  "hex": "#831021",
  "rgb": {
    "r": 131,
    "g": 16,
    "b": 33
  },
  "hsl": {
    "h": 351.13,
    "s": 78.231,
    "l": 28.824
  },
  "oklch": {
    "l": 0.39404,
    "c": 0.14675,
    "h": 20.8
  },
  "luminance": 0.05306
}

Semantic roles & 50–950 ramp

primary

#831021

secondary

#36B9A5

accent

#F5D833

background

#FBF5F5

surface

#F6EAE9

border

#D0C6C5

text

#120504

muted

#817979

Preview Lab

Preview with #831021

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

Preview Lab → · Contrast checker → · Palette generator →