#831B2A#831B2A

#831B2A is a dark, vivid red. Relative luminance 0.058; OKLCH L 40.4% C 0.138 H 18.6°. Best body text is #FFFFFF at 9.74:1 contrast (WCAG AA passes).

Color values

HEX	#831B2A
RGB	rgb(131, 27, 42)
HSL	hsl(351, 66%, 31%)
HSV	hsv(351, 79%, 51%)
CMYK	cmyk(0%, 79.4%, 67.9%, 48.6%)
CIE-LAB	lab(28.85, 44.08, 18.50)
CIE-LCH	lch(28.85, 47.81, 22.77°)
OKLab	oklab(40.38% 0.1308 0.0439)
OKLCH	oklch(40.38% 0.138 18.6)
XYZ	xyz(10.1710, 5.7779, 2.7697)
Luminance	0.0578 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#831B2A #1B8374

analogous

#831B5E #831B2A #83401B

triadic

#831B2A #2A831B #1B2A83

tetradic

#831B2A #5E831B #1B8374 #401B83

square

#831B2A #5E831B #1B8374 #401B83

split-complementary

#831B2A #1B8340 #1B5E83

monochromatic

#1E0609 #50111A #831B2A #B6253A #D84156

Accessibility & contrast

On white

9.74

#831B2A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#831B2A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #831B2A

9.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##831B2A	#FFFFFF	#000000	##FFFFFF
##831B2A	1.00	9.74	2.16	9.74
#FFFFFF	9.74	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#39362A

Deuteranopia (green-blind)

#534C27

Tritanopia (blue-blind)

#900022

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #831b2a;
/* rgb */ color: rgb(131, 27, 42);
/* oklch */ color: oklch(40.4% 0.138 18.6);

Tailwind

colors: {
  custom: {
    50: '#ae6263',
    500: '#831b2a',
    950: '#000000',
  },
}

SCSS

$custom: #831b2a;
$custom-light: #ae6263;
$custom-dark: #000000;

JSON

{
  "hex": "#831b2a",
  "rgb": {
    "r": 131,
    "g": 27,
    "b": 42
  },
  "hsl": {
    "h": 351.346,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.4038,
    "c": 0.13801,
    "h": 18.6
  },
  "luminance": 0.05776
}

Semantic roles & 50–950 ramp

primary

#831B2A

secondary

#43B6A6

accent

#E9D03F

background

#FBF6F5

surface

#F6EBEA

border

#D0C6C6

text

#120605

muted

#817A79

Preview Lab

Preview with #831B2A

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

Preview Lab → · Contrast checker → · Palette generator →