#B43740#B43740

#B43740 is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.4% C 0.161 H 20.7°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#B43740
RGB	rgb(180, 55, 64)
HSL	hsl(356, 53%, 46%)
HSV	hsv(356, 69%, 71%)
CMYK	cmyk(0%, 69.4%, 64.4%, 29.4%)
CIE-LAB	lab(42.47, 50.79, 23.83)
CIE-LCH	lch(42.47, 56.10, 25.14°)
OKLab	oklab(52.38% 0.1503 0.0569)
OKLCH	oklch(52.38% 0.161 20.7)
XYZ	xyz(21.1162, 12.8089, 6.2099)
Luminance	0.1281 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B43740 #37B4AB

analogous

#B4377E #B43740 #B46C37

triadic

#B43740 #40B437 #3740B4

tetradic

#B43740 #7EB437 #37B4AB #6C37B4

square

#B43740 #7EB437 #37B4AB #6C37B4

split-complementary

#B43740 #37B46C #377EB4

monochromatic

#561A1F #85292F #B43740 #CD5B63 #DB8A90

Accessibility & contrast

On white

5.90

#B43740 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#B43740 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B43740

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B43740	#FFFFFF	#000000	##FFFFFF
##B43740	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#59533F

Deuteranopia (green-blind)

#786E3C

Tritanopia (blue-blind)

#C5153B

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b43740;
/* rgb */ color: rgb(180, 55, 64);
/* oklch */ color: oklch(52.4% 0.161 20.7);

Tailwind

colors: {
  custom: {
    50: '#d17674',
    500: '#b43740',
    950: '#000000',
  },
}

SCSS

$custom: #b43740;
$custom-light: #d17674;
$custom-dark: #000000;

JSON

{
  "hex": "#b43740",
  "rgb": {
    "r": 180,
    "g": 55,
    "b": 64
  },
  "hsl": {
    "h": 355.68,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.52376,
    "c": 0.16066,
    "h": 20.7
  },
  "luminance": 0.12806
}

Semantic roles & 50–950 ramp

primary

#B43740

secondary

#81C6C1

accent

#DDD24B

background

#FDF7F7

surface

#FBEDED

border

#D4C8C8

text

#150908

muted

#837B7B

Preview Lab

Preview with #B43740

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

Preview Lab → · Contrast checker → · Palette generator →