#B73A31#B73A31

#B73A31 is a mid, vivid red. Relative luminance 0.133; OKLCH L 53.0% C 0.163 H 28.1°. Best body text is #FFFFFF at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#B73A31
RGB	rgb(183, 58, 49)
HSL	hsl(4, 58%, 45%)
HSV	hsv(4, 73%, 72%)
CMYK	cmyk(0%, 68.3%, 73.2%, 28.2%)
CIE-LAB	lab(43.24, 49.77, 33.82)
CIE-LCH	lch(43.24, 60.18, 34.20°)
OKLab	oklab(52.98% 0.1436 0.0765)
OKLCH	oklch(52.98% 0.163 28.1)
XYZ	xyz(21.5983, 13.3183, 4.3386)
Luminance	0.1331 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73A31 #31AEB7

analogous

#B7316B #B73A31 #B77D31

triadic

#B73A31 #31B73A #3A31B7

tetradic

#B73A31 #6BB731 #31AEB7 #7D31B7

square

#B73A31 #6BB731 #31AEB7 #7D31B7

split-complementary

#B73A31 #31B77D #316BB7

monochromatic

#561B17 #872B24 #B73A31 #D15C54 #DE8A84

Accessibility & contrast

On white

5.73

#B73A31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#B73A31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73A31

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73A31	#FFFFFF	#000000	##FFFFFF
##B73A31	1.00	5.73	3.66	5.73
#FFFFFF	5.73	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D552F

Deuteranopia (green-blind)

#7D702D

Tritanopia (blue-blind)

#C91439

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b73a31;
/* rgb */ color: rgb(183, 58, 49);
/* oklch */ color: oklch(53.0% 0.163 28.1);

Tailwind

colors: {
  custom: {
    50: '#d5776a',
    500: '#b73a31',
    950: '#000000',
  },
}

SCSS

$custom: #b73a31;
$custom-light: #d5776a;
$custom-dark: #000000;

JSON

{
  "hex": "#b73a31",
  "rgb": {
    "r": 183,
    "g": 58,
    "b": 49
  },
  "hsl": {
    "h": 4.03,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.52978,
    "c": 0.1627,
    "h": 28.1
  },
  "luminance": 0.13315
}

Semantic roles & 50–950 ramp

primary

#B73A31

secondary

#7CC2C8

accent

#D7E147

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B73A31

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

Preview Lab → · Contrast checker → · Palette generator →