#831F1B#831F1B

#831F1B is a dark, vivid red. Relative luminance 0.059; OKLCH L 40.5% C 0.136 H 27.5°. Best body text is #FFFFFF at 9.65:1 contrast (WCAG AA passes).

Color values

HEX	#831F1B
RGB	rgb(131, 31, 27)
HSL	hsl(2, 66%, 31%)
HSV	hsv(2, 79%, 51%)
CMYK	cmyk(0%, 76.3%, 79.4%, 48.6%)
CIE-LAB	lab(29.12, 41.93, 28.37)
CIE-LCH	lch(29.12, 50.63, 34.08°)
OKLab	oklab(40.51% 0.1205 0.0626)
OKLCH	oklch(40.51% 0.136 27.5)
XYZ	xyz(10.0491, 5.8860, 1.6437)
Luminance	0.0588 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#831F1B #1B7F83

analogous

#831B4B #831F1B #83531B

triadic

#831F1B #1B831F #1F1B83

tetradic

#831F1B #4B831B #1B7F83 #531B83

square

#831F1B #4B831B #1B7F83 #531B83

split-complementary

#831F1B #1B8353 #1B4B83

monochromatic

#1E0706 #501311 #831F1B #B62B25 #D84641

Accessibility & contrast

On white

9.65

#831F1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#831F1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #831F1B

9.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##831F1B	#FFFFFF	#000000	##FFFFFF
##831F1B	1.00	9.65	2.18	9.65
#FFFFFF	9.65	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D3719

Deuteranopia (green-blind)

#564D17

Tritanopia (blue-blind)

#91001F

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #831f1b;
/* rgb */ color: rgb(131, 31, 27);
/* oklch */ color: oklch(40.5% 0.136 27.5);

Tailwind

colors: {
  custom: {
    50: '#af6358',
    500: '#831f1b',
    950: '#000000',
  },
}

SCSS

$custom: #831f1b;
$custom-light: #af6358;
$custom-dark: #000000;

JSON

{
  "hex": "#831f1b",
  "rgb": {
    "r": 131,
    "g": 31,
    "b": 27
  },
  "hsl": {
    "h": 2.308,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.40514,
    "c": 0.13584,
    "h": 27.5
  },
  "luminance": 0.05884
}

Semantic roles & 50–950 ramp

primary

#831F1B

secondary

#43B2B6

accent

#E2E93F

background

#FBF6F5

surface

#F6EBE9

border

#D0C6C5

text

#120603

muted

#817A78

Preview Lab

Preview with #831F1B

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

Preview Lab → · Contrast checker → · Palette generator →