#831A2B#831A2B

#831A2B is a dark, vivid red. Relative luminance 0.057; OKLCH L 40.3% C 0.139 H 17.7°. Best body text is #FFFFFF at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#831A2B
RGB	rgb(131, 26, 43)
HSL	hsl(350, 67%, 31%)
HSV	hsv(350, 80%, 51%)
CMYK	cmyk(0%, 80.2%, 67.2%, 48.6%)
CIE-LAB	lab(28.75, 44.47, 17.71)
CIE-LCH	lch(28.75, 47.87, 21.72°)
OKLab	oklab(40.31% 0.1323 0.0423)
OKLCH	oklch(40.31% 0.139 17.7)
XYZ	xyz(10.1666, 5.7400, 2.8576)
Luminance	0.0574 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#831A2B #1A8372

analogous

#831A5F #831A2B #833D1A

triadic

#831A2B #2B831A #1A2B83

tetradic

#831A2B #5F831A #1A8372 #3D1A83

square

#831A2B #5F831A #1A8372 #3D1A83

split-complementary

#831A2B #1A833D #1A5F83

monochromatic

#1D0609 #50101A #831A2B #B6243C #D93F58

Accessibility & contrast

On white

9.78

#831A2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#831A2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #831A2B

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##831A2B	#FFFFFF	#000000	##FFFFFF
##831A2B	1.00	9.78	2.15	9.78
#FFFFFF	9.78	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#39362B

Deuteranopia (green-blind)

#534C28

Tritanopia (blue-blind)

#900021

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #831a2b;
/* rgb */ color: rgb(131, 26, 43);
/* oklch */ color: oklch(40.3% 0.139 17.7);

Tailwind

colors: {
  custom: {
    50: '#ae6164',
    500: '#831a2b',
    950: '#000000',
  },
}

SCSS

$custom: #831a2b;
$custom-light: #ae6164;
$custom-dark: #000000;

JSON

{
  "hex": "#831a2b",
  "rgb": {
    "r": 131,
    "g": 26,
    "b": 43
  },
  "hsl": {
    "h": 350.286,
    "s": 66.879,
    "l": 30.784
  },
  "oklch": {
    "l": 0.40313,
    "c": 0.13889,
    "h": 17.7
  },
  "luminance": 0.05739
}

Semantic roles & 50–950 ramp

primary

#831A2B

secondary

#42B7A4

accent

#EACE3E

background

#FBF6F5

surface

#F6EBEA

border

#D0C6C6

text

#120505

muted

#817A79

Preview Lab

Preview with #831A2B

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

Preview Lab → · Contrast checker → · Palette generator →