#B31D20#B31D20

#B31D20 is a mid, vivid red. Relative luminance 0.106; OKLCH L 49.5% C 0.184 H 26.5°. Best body text is #FFFFFF at 6.75:1 contrast (WCAG AA passes).

Color values

HEX	#B31D20
RGB	rgb(179, 29, 32)
HSL	hsl(359, 72%, 41%)
HSV	hsv(359, 84%, 70%)
CMYK	cmyk(0%, 83.8%, 82.1%, 29.8%)
CIE-LAB	lab(38.85, 57.44, 38.56)
CIE-LCH	lch(38.85, 69.18, 33.87°)
OKLab	oklab(49.51% 0.1647 0.0822)
OKLCH	oklch(49.51% 0.184 26.5)
XYZ	xyz(19.2929, 10.5699, 2.3906)
Luminance	0.1057 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31D20 #1DB3B0

analogous

#B31D6B #B31D20 #B3651D

triadic

#B31D20 #20B31D #1D20B3

tetradic

#B31D20 #6BB31D #1DB3B0 #651DB3

square

#B31D20 #6BB31D #1DB3B0 #651DB3

split-complementary

#B31D20 #1DB365 #1D6BB3

monochromatic

#4A0C0D #7E1417 #B31D20 #DD3033 #E66467

Accessibility & contrast

On white

6.75

#B31D20 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#B31D20 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31D20

6.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31D20	#FFFFFF	#000000	##FFFFFF
##B31D20	1.00	6.75	3.11	6.75
#FFFFFF	6.75	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F471E

Deuteranopia (green-blind)

#736718

Tritanopia (blue-blind)

#C60021

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #b31d20;
/* rgb */ color: rgb(179, 29, 32);
/* oklch */ color: oklch(49.5% 0.184 26.5);

Tailwind

colors: {
  custom: {
    50: '#d46a5d',
    500: '#b31d20',
    950: '#000000',
  },
}

SCSS

$custom: #b31d20;
$custom-light: #d46a5d;
$custom-dark: #000000;

JSON

{
  "hex": "#b31d20",
  "rgb": {
    "r": 179,
    "g": 29,
    "b": 32
  },
  "hsl": {
    "h": 358.8,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.49505,
    "c": 0.18404,
    "h": 26.5
  },
  "luminance": 0.10567
}

Semantic roles & 50–950 ramp

primary

#B31D20

secondary

#61CBC9

accent

#EFEB39

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160704

muted

#847A79

Preview Lab

Preview with #B31D20

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

Preview Lab → · Contrast checker → · Palette generator →