#831B1A#831B1A

#831B1A is a dark, vivid red. Relative luminance 0.057; OKLCH L 40.1% C 0.139 H 26.6°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#831B1A
RGB	rgb(131, 27, 26)
HSL	hsl(1, 67%, 31%)
HSV	hsv(1, 80%, 51%)
CMYK	cmyk(0%, 79.4%, 80.2%, 48.6%)
CIE-LAB	lab(28.60, 43.31, 28.42)
CIE-LCH	lch(28.60, 51.80, 33.28°)
OKLab	oklab(40.12% 0.1247 0.0624)
OKLCH	oklch(40.12% 0.139 26.6)
XYZ	xyz(9.9396, 5.6853, 1.5511)
Luminance	0.0568 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#831B1A #1A8283

analogous

#831A4D #831B1A #834F1A

triadic

#831B1A #1A831B #1B1A83

tetradic

#831B1A #4D831A #1A8283 #4F1A83

square

#831B1A #4D831A #1A8283 #4F1A83

split-complementary

#831B1A #1A834F #1A4D83

monochromatic

#1D0606 #501010 #831B1A #B62624 #D9403F

Accessibility & contrast

On white

9.83

#831B1A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#831B1A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #831B1A

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##831B1A	#FFFFFF	#000000	##FFFFFF
##831B1A	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B3519

Deuteranopia (green-blind)

#554C16

Tritanopia (blue-blind)

#91001C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #831b1a;
/* rgb */ color: rgb(131, 27, 26);
/* oklch */ color: oklch(40.1% 0.139 26.6);

Tailwind

colors: {
  custom: {
    50: '#af6157',
    500: '#831b1a',
    950: '#000000',
  },
}

SCSS

$custom: #831b1a;
$custom-light: #af6157;
$custom-dark: #000000;

JSON

{
  "hex": "#831b1a",
  "rgb": {
    "r": 131,
    "g": 27,
    "b": 26
  },
  "hsl": {
    "h": 0.571,
    "s": 66.879,
    "l": 30.784
  },
  "oklch": {
    "l": 0.40124,
    "c": 0.13941,
    "h": 26.6
  },
  "luminance": 0.05684
}

Semantic roles & 50–950 ramp

primary

#831B1A

secondary

#42B6B7

accent

#E8EA3E

background

#FBF6F5

surface

#F6EBE9

border

#D0C6C5

text

#120503

muted

#817A78

Preview Lab

Preview with #831B1A

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

Preview Lab → · Contrast checker → · Palette generator →