#B73A37#B73A37

#B73A37 is a mid, vivid red. Relative luminance 0.134; OKLCH L 53.1% C 0.162 H 25.7°. Best body text is #FFFFFF at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#B73A37
RGB	rgb(183, 58, 55)
HSL	hsl(1, 54%, 47%)
HSV	hsv(1, 70%, 72%)
CMYK	cmyk(0%, 68.3%, 69.9%, 28.2%)
CIE-LAB	lab(43.32, 50.06, 30.41)
CIE-LCH	lch(43.32, 58.58, 31.28°)
OKLab	oklab(53.06% 0.1458 0.0702)
OKLCH	oklch(53.06% 0.162 25.7)
XYZ	xyz(21.7334, 13.3724, 5.0504)
Luminance	0.1337 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73A37 #37B4B7

analogous

#B73774 #B73A37 #B77A37

triadic

#B73A37 #37B73A #3A37B7

tetradic

#B73A37 #74B737 #37B4B7 #7A37B7

square

#B73A37 #74B737 #37B4B7 #7A37B7

split-complementary

#B73A37 #37B77A #3774B7

monochromatic

#591C1B #882B29 #B73A37 #CE605D #DC8E8C

Accessibility & contrast

On white

5.72

#B73A37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#B73A37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73A37

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73A37	#FFFFFF	#000000	##FFFFFF
##B73A37	1.00	5.72	3.67	5.72
#FFFFFF	5.72	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D5536

Deuteranopia (green-blind)

#7C7033

Tritanopia (blue-blind)

#C9163B

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b73a37;
/* rgb */ color: rgb(183, 58, 55);
/* oklch */ color: oklch(53.1% 0.162 25.7);

Tailwind

colors: {
  custom: {
    50: '#d4786e',
    500: '#b73a37',
    950: '#000000',
  },
}

SCSS

$custom: #b73a37;
$custom-light: #d4786e;
$custom-dark: #000000;

JSON

{
  "hex": "#b73a37",
  "rgb": {
    "r": 183,
    "g": 58,
    "b": 55
  },
  "hsl": {
    "h": 1.406,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.53063,
    "c": 0.16178,
    "h": 25.7
  },
  "luminance": 0.13369
}

Semantic roles & 50–950 ramp

primary

#B73A37

secondary

#83C5C7

accent

#DADD4B

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #B73A37

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

Preview Lab → · Contrast checker → · Palette generator →