#B33837#B33837

#B33837 is a mid, vivid red. Relative luminance 0.127; OKLCH L 52.2% C 0.159 H 25.0°. Best body text is #FFFFFF at 5.94:1 contrast (WCAG AA passes).

Color values

HEX#B33837
RGBrgb(179, 56, 55)
HSLhsl(0, 53%, 46%)
HSVhsv(0, 69%, 70%)
CMYKcmyk(0%, 68.7%, 69.3%, 29.8%)
CIE-LABlab(42.29, 49.54, 29.01)
CIE-LCHlch(42.29, 57.41, 30.35°)
OKLaboklab(52.16% 0.1446 0.0673)
OKLCHoklch(52.16% 0.159 25)
XYZxyz(20.6964, 12.6909, 4.9735)
Luminance0.1269 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#B33837 #37B2B3
analogous
#B33774 #B33837 #B37637
triadic
#B33837 #37B338 #3837B3
tetradic
#B33837 #74B337 #37B2B3 #7637B3
square
#B33837 #74B337 #37B2B3 #7637B3
split-complementary
#B33837 #37B376 #3774B3
monochromatic
#551B1A #842929 #B33837 #CD5C5B #DB8A8A

Accessibility & contrast

On white

5.94
#B33837 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.54
#B33837 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33837
5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##B33837#FFFFFF#000000##FFFFFF
##B338371.005.943.545.94
#FFFFFF5.941.0021.001.00
#0000003.5421.001.0021.00
##FFFFFF5.941.0021.001.00

Color blindness preview

Protanopia (red-blind)
#5A5336
Deuteranopia (green-blind)
#796E33
Tritanopia (blue-blind)
#C51439
Achromatopsia (no color)
#646464

Design tokens & code

CSS
--color: #b33837;
/* rgb */ color: rgb(179, 56, 55);
/* oklch */ color: oklch(52.2% 0.159 25.0);
Tailwind
colors: {
  custom: {
    50: '#d1766e',
    500: '#b33837',
    950: '#000000',
  },
}
SCSS
$custom: #b33837;
$custom-light: #d1766e;
$custom-dark: #000000;
JSON
{
  "hex": "#b33837",
  "rgb": {
    "r": 179,
    "g": 56,
    "b": 55
  },
  "hsl": {
    "h": 0.484,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.52161,
    "c": 0.15949,
    "h": 25
  },
  "luminance": 0.12688
}

Semantic roles & 50–950 ramp

primary
#B33837
secondary
#81C5C5
accent
#DBDC4B
background
#FDF7F6
surface
#FBEDEB
border
#D4C8C6
text
#150907
muted
#837B7A

Preview Lab

Preview with #B33837

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

Preview Lab → · Contrast checker → · Palette generator →

#B33837 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva