#B73931#B73931

#B73931 is a mid, vivid red. Relative luminance 0.132; OKLCH L 52.9% C 0.164 H 27.7°. Best body text is #FFFFFF at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#B73931
RGB	rgb(183, 57, 49)
HSL	hsl(4, 58%, 45%)
HSV	hsv(4, 73%, 72%)
CMYK	cmyk(0%, 68.9%, 73.2%, 28.2%)
CIE-LAB	lab(43.09, 50.18, 33.66)
CIE-LCH	lch(43.09, 60.42, 33.85°)
OKLab	oklab(52.87% 0.1449 0.0762)
OKLCH	oklch(52.87% 0.164 27.7)
XYZ	xyz(21.5483, 13.2185, 4.3219)
Luminance	0.1321 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73931 #31AFB7

analogous

#B7316C #B73931 #B77C31

triadic

#B73931 #31B739 #3931B7

tetradic

#B73931 #6CB731 #31AFB7 #7C31B7

square

#B73931 #6CB731 #31AFB7 #7C31B7

split-complementary

#B73931 #31B77C #316CB7

monochromatic

#561B17 #872A24 #B73931 #D15B54 #DE8A84

Accessibility & contrast

On white

5.76

#B73931 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.64

#B73931 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73931

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73931	#FFFFFF	#000000	##FFFFFF
##B73931	1.00	5.76	3.64	5.76
#FFFFFF	5.76	1.00	21.00	1.00
#000000	3.64	21.00	1.00	21.00
##FFFFFF	5.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D542F

Deuteranopia (green-blind)

#7C702D

Tritanopia (blue-blind)

#C91138

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b73931;
/* rgb */ color: rgb(183, 57, 49);
/* oklch */ color: oklch(52.9% 0.164 27.7);

Tailwind

colors: {
  custom: {
    50: '#d57769',
    500: '#b73931',
    950: '#000000',
  },
}

SCSS

$custom: #b73931;
$custom-light: #d57769;
$custom-dark: #000000;

JSON

{
  "hex": "#b73931",
  "rgb": {
    "r": 183,
    "g": 57,
    "b": 49
  },
  "hsl": {
    "h": 3.582,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.52867,
    "c": 0.16365,
    "h": 27.7
  },
  "luminance": 0.13215
}

Semantic roles & 50–950 ramp

primary

#B73931

secondary

#7CC3C8

accent

#D8E147

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B73931

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

Preview Lab → · Contrast checker → · Palette generator →