#B73037#B73037

#B73037 is a mid, vivid red. Relative luminance 0.125; OKLCH L 52.0% C 0.171 H 22.9°. Best body text is #FFFFFF at 6.01:1 contrast (WCAG AA passes).

Color values

HEX	#B73037
RGB	rgb(183, 48, 55)
HSL	hsl(357, 58%, 45%)
HSV	hsv(357, 74%, 72%)
CMYK	cmyk(0%, 73.8%, 69.9%, 28.2%)
CIE-LAB	lab(41.94, 53.86, 28.76)
CIE-LCH	lch(41.94, 61.06, 28.10°)
OKLab	oklab(52.03% 0.1578 0.0666)
OKLCH	oklch(52.03% 0.171 22.9)
XYZ	xyz(21.2773, 12.4602, 4.8984)
Luminance	0.1246 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73037 #30B7B0

analogous

#B7307A #B73037 #B76C30

triadic

#B73037 #37B730 #3037B7

tetradic

#B73037 #7AB730 #30B7B0 #6C30B7

square

#B73037 #7AB730 #30B7B0 #6C30B7

split-complementary

#B73037 #30B76C #307AB7

monochromatic

#56171A #872328 #B73037 #D25259 #DE8388

Accessibility & contrast

On white

6.01

#B73037 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#B73037 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73037

6.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73037	#FFFFFF	#000000	##FFFFFF
##B73037	1.00	6.01	3.49	6.01
#FFFFFF	6.01	1.00	21.00	1.00
#000000	3.49	21.00	1.00	21.00
##FFFFFF	6.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#575136

Deuteranopia (green-blind)

#796D33

Tritanopia (blue-blind)

#C90034

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b73037;
/* rgb */ color: rgb(183, 48, 55);
/* oklch */ color: oklch(52.0% 0.171 22.9);

Tailwind

colors: {
  custom: {
    50: '#d5736e',
    500: '#b73037',
    950: '#000000',
  },
}

SCSS

$custom: #b73037;
$custom-light: #d5736e;
$custom-dark: #000000;

JSON

{
  "hex": "#b73037",
  "rgb": {
    "r": 183,
    "g": 48,
    "b": 55
  },
  "hsl": {
    "h": 356.889,
    "s": 58.442,
    "l": 45.294
  },
  "oklch": {
    "l": 0.52033,
    "c": 0.17125,
    "h": 22.9
  },
  "luminance": 0.12457
}

Semantic roles & 50–950 ramp

primary

#B73037

secondary

#7BC8C4

accent

#E2DA46

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #B73037

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

Preview Lab → · Contrast checker → · Palette generator →