#B43738#B43738

#B43738 is a mid, vivid red. Relative luminance 0.127; OKLCH L 52.2% C 0.161 H 24.3°. Best body text is #FFFFFF at 5.93:1 contrast (WCAG AA passes).

Color values

HEX#B43738
RGBrgb(180, 55, 56)
HSLhsl(360, 53%, 46%)
HSVhsv(360, 69%, 71%)
CMYKcmyk(0%, 69.4%, 68.9%, 29.4%)
CIE-LABlab(42.34, 50.33, 28.52)
CIE-LCHlch(42.34, 57.85, 29.54°)
OKLaboklab(52.24% 0.1472 0.0663)
OKLCHoklch(52.24% 0.161 24.3)
XYZxyz(20.9046, 12.7242, 5.0959)
Luminance0.1272 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#B43738 #37B4B3
analogous
#B43776 #B43738 #B47437
triadic
#B43738 #38B437 #3738B4
tetradic
#B43738 #76B437 #37B4B3 #7437B4
square
#B43738 #76B437 #37B4B3 #7437B4
split-complementary
#B43738 #37B474 #3776B4
monochromatic
#561A1B #852929 #B43738 #CD5B5C #DB8A8B

Accessibility & contrast

On white

5.93
#B43738 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.54
#B43738 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B43738
5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##B43738#FFFFFF#000000##FFFFFF
##B437381.005.933.545.93
#FFFFFF5.931.0021.001.00
#0000003.5421.001.0021.00
##FFFFFF5.931.0021.001.00

Color blindness preview

Protanopia (red-blind)
#5A5337
Deuteranopia (green-blind)
#796E34
Tritanopia (blue-blind)
#C61139
Achromatopsia (no color)
#646464

Design tokens & code

CSS
--color: #b43738;
/* rgb */ color: rgb(180, 55, 56);
/* oklch */ color: oklch(52.2% 0.161 24.3);
Tailwind
colors: {
  custom: {
    50: '#d2766e',
    500: '#b43738',
    950: '#000000',
  },
}
SCSS
$custom: #b43738;
$custom-light: #d2766e;
$custom-dark: #000000;
JSON
{
  "hex": "#b43738",
  "rgb": {
    "r": 180,
    "g": 55,
    "b": 56
  },
  "hsl": {
    "h": 359.52,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.52238,
    "c": 0.16142,
    "h": 24.3
  },
  "luminance": 0.12721
}

Semantic roles & 50–950 ramp

primary
#B43738
secondary
#81C6C5
accent
#DDDB4B
background
#FDF7F6
surface
#FBEDEC
border
#D4C8C7
text
#150907
muted
#837B7A

Preview Lab

Preview with #B43738

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

Preview Lab → · Contrast checker → · Palette generator →

#B43738 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva