#B73740#B73740

#B73740 is a mid, vivid red. Relative luminance 0.132; OKLCH L 52.9% C 0.164 H 21.0°. Best body text is #FFFFFF at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#B73740
RGB	rgb(183, 55, 64)
HSL	hsl(356, 54%, 47%)
HSV	hsv(356, 70%, 72%)
CMYK	cmyk(0%, 69.9%, 65%, 28.2%)
CIE-LAB	lab(43.02, 51.76, 24.64)
CIE-LCH	lch(43.02, 57.32, 25.46°)
OKLab	oklab(52.89% 0.153 0.0586)
OKLCH	oklch(52.89% 0.164 21)
XYZ	xyz(21.8223, 13.1730, 6.2430)
Luminance	0.1317 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73740 #37B7AE

analogous

#B73780 #B73740 #B76E37

triadic

#B73740 #40B737 #3740B7

tetradic

#B73740 #80B737 #37B7AE #6E37B7

square

#B73740 #80B737 #37B7AE #6E37B7

split-complementary

#B73740 #37B76E #3780B7

monochromatic

#591B1F #882930 #B73740 #CE5D65 #DC8C92

Accessibility & contrast

On white

5.78

#B73740 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.63

#B73740 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73740

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73740	#FFFFFF	#000000	##FFFFFF
##B73740	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)

#5A543F

Deuteranopia (green-blind)

#7A703C

Tritanopia (blue-blind)

#C9123B

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b73740;
/* rgb */ color: rgb(183, 55, 64);
/* oklch */ color: oklch(52.9% 0.164 21.0);

Tailwind

colors: {
  custom: {
    50: '#d47674',
    500: '#b73740',
    950: '#000000',
  },
}

SCSS

$custom: #b73740;
$custom-light: #d47674;
$custom-dark: #000000;

JSON

{
  "hex": "#b73740",
  "rgb": {
    "r": 183,
    "g": 55,
    "b": 64
  },
  "hsl": {
    "h": 355.781,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.52887,
    "c": 0.16382,
    "h": 21
  },
  "luminance": 0.1317
}

Semantic roles & 50–950 ramp

primary

#B73740

secondary

#83C7C2

accent

#DDD34B

background

#FEF7F7

surface

#FCEDED

border

#D5C8C8

text

#160908

muted

#847B7B

Preview Lab

Preview with #B73740

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

Preview Lab → · Contrast checker → · Palette generator →