#B73837#B73837

#B73837 is a mid, vivid red. Relative luminance 0.132; OKLCH L 52.8% C 0.164 H 25.1°. Best body text is #FFFFFF at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#B73837
RGB	rgb(183, 56, 55)
HSL	hsl(0, 54%, 47%)
HSV	hsv(0, 70%, 72%)
CMYK	cmyk(0%, 69.4%, 69.9%, 28.2%)
CIE-LAB	lab(43.03, 50.87, 30.06)
CIE-LCH	lch(43.03, 59.09, 30.58°)
OKLab	oklab(52.84% 0.1483 0.0695)
OKLCH	oklch(52.84% 0.164 25.1)
XYZ	xyz(21.6345, 13.1746, 5.0175)
Luminance	0.1317 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73837 #37B6B7

analogous

#B73776 #B73837 #B77837

triadic

#B73837 #37B738 #3837B7

tetradic

#B73837 #76B737 #37B6B7 #7837B7

square

#B73837 #76B737 #37B6B7 #7837B7

split-complementary

#B73837 #37B778 #3776B7

monochromatic

#591B1B #882A29 #B73837 #CE5E5D #DC8D8C

Accessibility & contrast

On white

5.78

#B73837 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.63

#B73837 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73837

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73837	#FFFFFF	#000000	##FFFFFF
##B73837	1.00	5.78	3.63	5.78
#FFFFFF	5.78	1.00	21.00	1.00
#000000	3.63	21.00	1.00	21.00
##FFFFFF	5.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5436

Deuteranopia (green-blind)

#7B7033

Tritanopia (blue-blind)

#C91039

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b73837;
/* rgb */ color: rgb(183, 56, 55);
/* oklch */ color: oklch(52.8% 0.164 25.1);

Tailwind

colors: {
  custom: {
    50: '#d4776e',
    500: '#b73837',
    950: '#000000',
  },
}

SCSS

$custom: #b73837;
$custom-light: #d4776e;
$custom-dark: #000000;

JSON

{
  "hex": "#b73837",
  "rgb": {
    "r": 183,
    "g": 56,
    "b": 55
  },
  "hsl": {
    "h": 0.469,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.52843,
    "c": 0.16374,
    "h": 25.1
  },
  "luminance": 0.13171
}

Semantic roles & 50–950 ramp

primary

#B73837

secondary

#83C6C7

accent

#DCDD4B

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #B73837

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

Preview Lab → · Contrast checker → · Palette generator →