#B73F37#B73F37

#B73F37 is a mid, vivid red. Relative luminance 0.139; OKLCH L 53.6% C 0.157 H 27.4°. Best body text is #FFFFFF at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#B73F37
RGB	rgb(183, 63, 55)
HSL	hsl(4, 54%, 47%)
HSV	hsv(4, 70%, 72%)
CMYK	cmyk(0%, 65.6%, 69.9%, 28.2%)
CIE-LAB	lab(44.09, 47.97, 31.33)
CIE-LCH	lch(44.09, 57.30, 33.15°)
OKLab	oklab(53.64% 0.1392 0.0722)
OKLCH	oklch(53.64% 0.157 27.4)
XYZ	xyz(21.9978, 13.9012, 5.1386)
Luminance	0.1390 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73F37 #37AFB7

analogous

#B7376F #B73F37 #B77F37

triadic

#B73F37 #37B73F #3F37B7

tetradic

#B73F37 #6FB737 #37AFB7 #7F37B7

square

#B73F37 #6FB737 #37AFB7 #7F37B7

split-complementary

#B73F37 #37B77F #376FB7

monochromatic

#591F1B #882F29 #B73F37 #CE645D #DC918C

Accessibility & contrast

On white

5.56

#B73F37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.78

#B73F37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73F37

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73F37	#FFFFFF	#000000	##FFFFFF
##B73F37	1.00	5.56	3.78	5.56
#FFFFFF	5.56	1.00	21.00	1.00
#000000	3.78	21.00	1.00	21.00
##FFFFFF	5.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#605835

Deuteranopia (green-blind)

#7E7233

Tritanopia (blue-blind)

#C9203E

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #b73f37;
/* rgb */ color: rgb(183, 63, 55);
/* oklch */ color: oklch(53.6% 0.157 27.4);

Tailwind

colors: {
  custom: {
    50: '#d47a6e',
    500: '#b73f37',
    950: '#000000',
  },
}

SCSS

$custom: #b73f37;
$custom-light: #d47a6e;
$custom-dark: #000000;

JSON

{
  "hex": "#b73f37",
  "rgb": {
    "r": 183,
    "g": 63,
    "b": 55
  },
  "hsl": {
    "h": 3.75,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.53642,
    "c": 0.15679,
    "h": 27.4
  },
  "luminance": 0.13898
}

Semantic roles & 50–950 ramp

primary

#B73F37

secondary

#83C3C7

accent

#D4DD4B

background

#FEF7F6

surface

#FCEEEC

border

#D5C9C7

text

#160A07

muted

#847C7A

Preview Lab

Preview with #B73F37

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

Preview Lab → · Contrast checker → · Palette generator →