#B73731#B73731

#B73731 is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.6% C 0.166 H 27.1°. Best body text is #FFFFFF at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#B73731
RGB	rgb(183, 55, 49)
HSL	hsl(3, 58%, 45%)
HSV	hsv(3, 73%, 72%)
CMYK	cmyk(0%, 69.9%, 73.2%, 28.2%)
CIE-LAB	lab(42.80, 50.97, 33.33)
CIE-LCH	lch(42.80, 60.90, 33.18°)
OKLab	oklab(52.65% 0.1474 0.0754)
OKLCH	oklch(52.65% 0.166 27.1)
XYZ	xyz(21.4514, 13.0246, 4.2896)
Luminance	0.1302 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73731 #31B1B7

analogous

#B7316E #B73731 #B77A31

triadic

#B73731 #31B737 #3731B7

tetradic

#B73731 #6EB731 #31B1B7 #7A31B7

square

#B73731 #6EB731 #31B1B7 #7A31B7

split-complementary

#B73731 #31B77A #316EB7

monochromatic

#561A17 #872824 #B73731 #D15A54 #DE8884

Accessibility & contrast

On white

5.83

#B73731 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#B73731 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73731

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73731	#FFFFFF	#000000	##FFFFFF
##B73731	1.00	5.83	3.60	5.83
#FFFFFF	5.83	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C532F

Deuteranopia (green-blind)

#7C6F2D

Tritanopia (blue-blind)

#C90A37

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b73731;
/* rgb */ color: rgb(183, 55, 49);
/* oklch */ color: oklch(52.6% 0.166 27.1);

Tailwind

colors: {
  custom: {
    50: '#d57669',
    500: '#b73731',
    950: '#000000',
  },
}

SCSS

$custom: #b73731;
$custom-light: #d57669;
$custom-dark: #000000;

JSON

{
  "hex": "#b73731",
  "rgb": {
    "r": 183,
    "g": 55,
    "b": 49
  },
  "hsl": {
    "h": 2.687,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.52649,
    "c": 0.16554,
    "h": 27.1
  },
  "luminance": 0.13021
}

Semantic roles & 50–950 ramp

primary

#B73731

secondary

#7CC4C8

accent

#DAE147

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B73731

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

Preview Lab → · Contrast checker → · Palette generator →