#831011#831011

#831011 is a dark, vivid red. Relative luminance 0.052; OKLCH L 39.2% C 0.148 H 27.3°. Best body text is #FFFFFF at 10.26:1 contrast (WCAG AA passes).

Color values

HEX	#831011
RGB	rgb(131, 16, 17)
HSL	hsl(359, 78%, 29%)
HSV	hsv(359, 88%, 51%)
CMYK	cmyk(0%, 87.8%, 87%, 48.6%)
CIE-LAB	lab(27.40, 46.16, 32.49)
CIE-LCH	lch(27.40, 56.45, 35.14°)
OKLab	oklab(39.2% 0.1317 0.0679)
OKLCH	oklch(39.2% 0.148 27.3)
XYZ	xyz(9.6478, 5.2380, 1.0333)
Luminance	0.0524 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#831011 #108382

analogous

#83104B #831011 #834910

triadic

#831011 #118310 #101183

tetradic

#831011 #4B8310 #108382 #491083

square

#831011 #4B8310 #108382 #491083

split-complementary

#831011 #108349 #104B83

monochromatic

#1B0304 #4C090A #831011 #BA1718 #E5292A

Accessibility & contrast

On white

10.26

#831011 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#831011 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #831011

10.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##831011	#FFFFFF	#000000	##FFFFFF
##831011	1.00	10.26	2.05	10.26
#FFFFFF	10.26	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#37310F

Deuteranopia (green-blind)

#53490A

Tritanopia (blue-blind)

#910013

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #831011;
/* rgb */ color: rgb(131, 16, 17);
/* oklch */ color: oklch(39.2% 0.148 27.3);

Tailwind

colors: {
  custom: {
    50: '#b05d50',
    500: '#831011',
    950: '#000000',
  },
}

SCSS

$custom: #831011;
$custom-light: #b05d50;
$custom-dark: #000000;

JSON

{
  "hex": "#831011",
  "rgb": {
    "r": 131,
    "g": 16,
    "b": 17
  },
  "hsl": {
    "h": 359.478,
    "s": 78.231,
    "l": 28.824
  },
  "oklch": {
    "l": 0.39203,
    "c": 0.14818,
    "h": 27.3
  },
  "luminance": 0.05236
}

Semantic roles & 50–950 ramp

primary

#831011

secondary

#36B9B8

accent

#F5F333

background

#FCF5F4

surface

#F8EAE7

border

#D1C6C3

text

#120502

muted

#817978

Preview Lab

Preview with #831011

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

Preview Lab → · Contrast checker → · Palette generator →