#831B1F#831B1F

#831B1F is a dark, vivid red. Relative luminance 0.057; OKLCH L 40.2% C 0.139 H 24.4°. Best body text is #FFFFFF at 9.81:1 contrast (WCAG AA passes).

Color values

HEX	#831B1F
RGB	rgb(131, 27, 31)
HSL	hsl(358, 66%, 31%)
HSV	hsv(358, 79%, 51%)
CMYK	cmyk(0%, 79.4%, 76.3%, 48.6%)
CIE-LAB	lab(28.67, 43.51, 25.40)
CIE-LCH	lch(28.67, 50.38, 30.27°)
OKLab	oklab(40.19% 0.1265 0.0572)
OKLCH	oklch(40.19% 0.139 24.4)
XYZ	xyz(10.0005, 5.7097, 1.8716)
Luminance	0.0571 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#831B1F #1B837F

analogous

#831B53 #831B1F #834B1B

triadic

#831B1F #1F831B #1B1F83

tetradic

#831B1F #53831B #1B837F #4B1B83

square

#831B1F #53831B #1B837F #4B1B83

split-complementary

#831B1F #1B834B #1B5383

monochromatic

#1E0607 #501113 #831B1F #B6252B #D84146

Accessibility & contrast

On white

9.81

#831B1F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#831B1F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #831B1F

9.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##831B1F	#FFFFFF	#000000	##FFFFFF
##831B1F	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)

#3B351E

Deuteranopia (green-blind)

#544C1B

Tritanopia (blue-blind)

#91001E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #831b1f;
/* rgb */ color: rgb(131, 27, 31);
/* oklch */ color: oklch(40.2% 0.139 24.4);

Tailwind

colors: {
  custom: {
    50: '#af615a',
    500: '#831b1f',
    950: '#000000',
  },
}

SCSS

$custom: #831b1f;
$custom-light: #af615a;
$custom-dark: #000000;

JSON

{
  "hex": "#831b1f",
  "rgb": {
    "r": 131,
    "g": 27,
    "b": 31
  },
  "hsl": {
    "h": 357.692,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.40191,
    "c": 0.1388,
    "h": 24.4
  },
  "luminance": 0.05708
}

Semantic roles & 50–950 ramp

primary

#831B1F

secondary

#43B6B2

accent

#E9E23F

background

#FBF6F5

surface

#F6EBE9

border

#D0C6C5

text

#120504

muted

#817A79

Preview Lab

Preview with #831B1F

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

Preview Lab → · Contrast checker → · Palette generator →