#831B1D#831B1D

#831B1D is a dark, vivid red. Relative luminance 0.057; OKLCH L 40.2% C 0.139 H 25.3°. Best body text is #FFFFFF at 9.81:1 contrast (WCAG AA passes).

Color values

HEX	#831B1D
RGB	rgb(131, 27, 29)
HSL	hsl(359, 66%, 31%)
HSV	hsv(359, 79%, 51%)
CMYK	cmyk(0%, 79.4%, 77.9%, 48.6%)
CIE-LAB	lab(28.64, 43.43, 26.62)
CIE-LCH	lch(28.64, 50.94, 31.51°)
OKLab	oklab(40.16% 0.1257 0.0594)
OKLCH	oklch(40.16% 0.139 25.3)
XYZ	xyz(9.9750, 5.6994, 1.7370)
Luminance	0.0570 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#831B1D #1B8381

analogous

#831B51 #831B1D #834D1B

triadic

#831B1D #1D831B #1B1D83

tetradic

#831B1D #51831B #1B8381 #4D1B83

square

#831B1D #51831B #1B8381 #4D1B83

split-complementary

#831B1D #1B834D #1B5183

monochromatic

#1E0607 #501112 #831B1D #B62528 #D84144

Accessibility & contrast

On white

9.81

#831B1D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#831B1D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #831B1D

9.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##831B1D	#FFFFFF	#000000	##FFFFFF
##831B1D	1.00	9.81	2.14	9.81
#FFFFFF	9.81	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B351C

Deuteranopia (green-blind)

#554C19

Tritanopia (blue-blind)

#91001D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #831b1d;
/* rgb */ color: rgb(131, 27, 29);
/* oklch */ color: oklch(40.2% 0.139 25.3);

Tailwind

colors: {
  custom: {
    50: '#af6159',
    500: '#831b1d',
    950: '#000000',
  },
}

SCSS

$custom: #831b1d;
$custom-light: #af6159;
$custom-dark: #000000;

JSON

{
  "hex": "#831b1d",
  "rgb": {
    "r": 131,
    "g": 27,
    "b": 29
  },
  "hsl": {
    "h": 358.846,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.40163,
    "c": 0.13903,
    "h": 25.3
  },
  "luminance": 0.05698
}

Semantic roles & 50–950 ramp

primary

#831B1D

secondary

#43B6B4

accent

#E9E63F

background

#FBF6F5

surface

#F6EBE9

border

#D0C6C5

text

#120503

muted

#817A78

Preview Lab

Preview with #831B1D

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

Preview Lab → · Contrast checker → · Palette generator →