#B43737#B43737

#B43737 is a mid, vivid red. Relative luminance 0.127; OKLCH L 52.2% C 0.162 H 24.7°. Best body text is #FFFFFF at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#B43737
RGB	rgb(180, 55, 55)
HSL	hsl(0, 53%, 46%)
HSV	hsv(0, 69%, 71%)
CMYK	cmyk(0%, 69.4%, 69.4%, 29.4%)
CIE-LAB	lab(42.33, 50.27, 29.10)
CIE-LCH	lch(42.33, 58.09, 30.06°)
OKLab	oklab(52.22% 0.1468 0.0675)
OKLCH	oklch(52.22% 0.162 24.7)
XYZ	xyz(20.8804, 12.7146, 4.9684)
Luminance	0.1271 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B43737 #37B4B4

analogous

#B43775 #B43737 #B47537

triadic

#B43737 #37B437 #3737B4

tetradic

#B43737 #75B437 #37B4B4 #7537B4

square

#B43737 #75B437 #37B4B4 #7537B4

split-complementary

#B43737 #37B475 #3775B4

monochromatic

#561A1A #852929 #B43737 #CD5B5B #DB8A8A

Accessibility & contrast

On white

5.93

#B43737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#B43737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B43737

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B43737	#FFFFFF	#000000	##FFFFFF
##B43737	1.00	5.93	3.54	5.93
#FFFFFF	5.93	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A5336

Deuteranopia (green-blind)

#796E33

Tritanopia (blue-blind)

#C61138

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b43737;
/* rgb */ color: rgb(180, 55, 55);
/* oklch */ color: oklch(52.2% 0.162 24.7);

Tailwind

colors: {
  custom: {
    50: '#d2766e',
    500: '#b43737',
    950: '#000000',
  },
}

SCSS

$custom: #b43737;
$custom-light: #d2766e;
$custom-dark: #000000;

JSON

{
  "hex": "#b43737",
  "rgb": {
    "r": 180,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.52222,
    "c": 0.16154,
    "h": 24.7
  },
  "luminance": 0.12712
}

Semantic roles & 50–950 ramp

primary

#B43737

secondary

#81C6C6

accent

#DDDD4B

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #B43737

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

Preview Lab → · Contrast checker → · Palette generator →