#B43739#B43739

#B43739 is a mid, vivid red. Relative luminance 0.127; OKLCH L 52.3% C 0.161 H 23.8°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#B43739
RGB	rgb(180, 55, 57)
HSL	hsl(359, 53%, 46%)
HSV	hsv(359, 69%, 71%)
CMYK	cmyk(0%, 69.4%, 68.3%, 29.4%)
CIE-LAB	lab(42.36, 50.38, 27.94)
CIE-LCH	lch(42.36, 57.61, 29.01°)
OKLab	oklab(52.25% 0.1475 0.0652)
OKLCH	oklch(52.25% 0.161 23.8)
XYZ	xyz(20.9293, 12.7341, 5.2260)
Luminance	0.1273 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B43739 #37B4B2

analogous

#B43777 #B43739 #B47337

triadic

#B43739 #39B437 #3739B4

tetradic

#B43739 #77B437 #37B4B2 #7337B4

square

#B43739 #77B437 #37B4B2 #7337B4

split-complementary

#B43739 #37B473 #3777B4

monochromatic

#561A1B #85292A #B43739 #CD5B5D #DB8A8B

Accessibility & contrast

On white

5.92

#B43739 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#B43739 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B43739

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B43739	#FFFFFF	#000000	##FFFFFF
##B43739	1.00	5.92	3.55	5.92
#FFFFFF	5.92	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A5338

Deuteranopia (green-blind)

#796E35

Tritanopia (blue-blind)

#C61139

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b43739;
/* rgb */ color: rgb(180, 55, 57);
/* oklch */ color: oklch(52.3% 0.161 23.8);

Tailwind

colors: {
  custom: {
    50: '#d2766f',
    500: '#b43739',
    950: '#000000',
  },
}

SCSS

$custom: #b43739;
$custom-light: #d2766f;
$custom-dark: #000000;

JSON

{
  "hex": "#b43739",
  "rgb": {
    "r": 180,
    "g": 55,
    "b": 57
  },
  "hsl": {
    "h": 359.04,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.52254,
    "c": 0.1613,
    "h": 23.8
  },
  "luminance": 0.12731
}

Semantic roles & 50–950 ramp

primary

#B43739

secondary

#81C6C4

accent

#DDDA4B

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #B43739

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

Preview Lab → · Contrast checker → · Palette generator →