#831B21#831B21

#831B21 is a dark, vivid red. Relative luminance 0.057; OKLCH L 40.2% C 0.139 H 23.4°. Best body text is #FFFFFF at 9.80:1 contrast (WCAG AA passes).

Color values

HEX	#831B21
RGB	rgb(131, 27, 33)
HSL	hsl(357, 66%, 31%)
HSV	hsv(357, 79%, 51%)
CMYK	cmyk(0%, 79.4%, 74.8%, 48.6%)
CIE-LAB	lab(28.70, 43.60, 24.16)
CIE-LCH	lch(28.70, 49.85, 28.99°)
OKLab	oklab(40.22% 0.1272 0.055)
OKLCH	oklch(40.22% 0.139 23.4)
XYZ	xyz(10.0277, 5.7205, 2.0147)
Luminance	0.0572 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#831B21 #1B837D

analogous

#831B55 #831B21 #83491B

triadic

#831B21 #21831B #1B2183

tetradic

#831B21 #55831B #1B837D #491B83

square

#831B21 #55831B #1B837D #491B83

split-complementary

#831B21 #1B8349 #1B5583

monochromatic

#1E0607 #501114 #831B21 #B6252E #D84149

Accessibility & contrast

On white

9.80

#831B21 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#831B21 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #831B21

9.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##831B21	#FFFFFF	#000000	##FFFFFF
##831B21	1.00	9.80	2.14	9.80
#FFFFFF	9.80	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A3520

Deuteranopia (green-blind)

#544C1D

Tritanopia (blue-blind)

#91001E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #831b21;
/* rgb */ color: rgb(131, 27, 33);
/* oklch */ color: oklch(40.2% 0.139 23.4);

Tailwind

colors: {
  custom: {
    50: '#af625c',
    500: '#831b21',
    950: '#000000',
  },
}

SCSS

$custom: #831b21;
$custom-light: #af625c;
$custom-dark: #000000;

JSON

{
  "hex": "#831b21",
  "rgb": {
    "r": 131,
    "g": 27,
    "b": 33
  },
  "hsl": {
    "h": 356.538,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.40221,
    "c": 0.13859,
    "h": 23.4
  },
  "luminance": 0.05719
}

Semantic roles & 50–950 ramp

primary

#831B21

secondary

#43B6B0

accent

#E9DF3F

background

#FBF6F5

surface

#F6EBE9

border

#D0C6C5

text

#120504

muted

#817A79

Preview Lab

Preview with #831B21

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

Preview Lab → · Contrast checker → · Palette generator →