#831A1B#831A1B

#831A1B is a dark, vivid red. Relative luminance 0.056; OKLCH L 40.0% C 0.140 H 25.9°. Best body text is #FFFFFF at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#831A1B
RGB	rgb(131, 26, 27)
HSL	hsl(359, 67%, 31%)
HSV	hsv(359, 80%, 51%)
CMYK	cmyk(0%, 80.2%, 79.4%, 48.6%)
CIE-LAB	lab(28.50, 43.68, 27.70)
CIE-LCH	lch(28.50, 51.72, 32.38°)
OKLab	oklab(40.05% 0.126 0.0612)
OKLCH	oklch(40.05% 0.14 25.9)
XYZ	xyz(9.9285, 5.6448, 1.6035)
Luminance	0.0564 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#831A1B #1A8382

analogous

#831A4F #831A1B #834D1A

triadic

#831A1B #1B831A #1A1B83

tetradic

#831A1B #4F831A #1A8382 #4D1A83

square

#831A1B #4F831A #1A8382 #4D1A83

split-complementary

#831A1B #1A834D #1A4F83

monochromatic

#1D0606 #501010 #831A1B #B62426 #D93F40

Accessibility & contrast

On white

9.87

#831A1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#831A1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #831A1B

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##831A1B	#FFFFFF	#000000	##FFFFFF
##831A1B	1.00	9.87	2.13	9.87
#FFFFFF	9.87	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B351A

Deuteranopia (green-blind)

#554B17

Tritanopia (blue-blind)

#91001C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #831a1b;
/* rgb */ color: rgb(131, 26, 27);
/* oklch */ color: oklch(40.0% 0.140 25.9);

Tailwind

colors: {
  custom: {
    50: '#af6157',
    500: '#831a1b',
    950: '#000000',
  },
}

SCSS

$custom: #831a1b;
$custom-light: #af6157;
$custom-dark: #000000;

JSON

{
  "hex": "#831a1b",
  "rgb": {
    "r": 131,
    "g": 26,
    "b": 27
  },
  "hsl": {
    "h": 359.429,
    "s": 66.879,
    "l": 30.784
  },
  "oklch": {
    "l": 0.40049,
    "c": 0.1401,
    "h": 25.9
  },
  "luminance": 0.05643
}

Semantic roles & 50–950 ramp

primary

#831A1B

secondary

#42B7B6

accent

#EAE83E

background

#FBF6F5

surface

#F6EBE9

border

#D0C6C5

text

#120503

muted

#817A78

Preview Lab

Preview with #831A1B

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

Preview Lab → · Contrast checker → · Palette generator →