#B13731#B13731

#B13731 is a mid, vivid red. Relative luminance 0.123; OKLCH L 51.6% C 0.159 H 27.0°. Best body text is #FFFFFF at 6.07:1 contrast (WCAG AA passes).

Color values

HEX#B13731
RGBrgb(177, 55, 49)
HSLhsl(3, 57%, 44%)
HSVhsv(3, 72%, 69%)
CMYKcmyk(0%, 68.9%, 72.3%, 30.6%)
CIE-LABlab(41.70, 48.98, 31.77)
CIE-LCHlch(41.70, 58.38, 32.97°)
OKLaboklab(51.62% 0.1418 0.0724)
OKLCHoklch(51.62% 0.159 27)
XYZxyz(20.0542, 12.3042, 4.2241)
Luminance0.1230 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#B13731 #31ABB1
analogous
#B1316B #B13731 #B17731
triadic
#B13731 #31B137 #3731B1
tetradic
#B13731 #6BB131 #31ABB1 #7731B1
square
#B13731 #6BB131 #31ABB1 #7731B1
split-complementary
#B13731 #31B177 #316BB1
monochromatic
#511916 #812824 #B13731 #CF5651 #DC8580

Accessibility & contrast

On white

6.07
#B13731 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.46
#B13731 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B13731
6.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##B13731#FFFFFF#000000##FFFFFF
##B137311.006.073.466.07
#FFFFFF6.071.0021.001.00
#0000003.4621.001.0021.00
##FFFFFF6.071.0021.001.00

Color blindness preview

Protanopia (red-blind)
#59522F
Deuteranopia (green-blind)
#786C2D
Tritanopia (blue-blind)
#C31137
Achromatopsia (no color)
#626262

Design tokens & code

CSS
--color: #b13731;
/* rgb */ color: rgb(177, 55, 49);
/* oklch */ color: oklch(51.6% 0.159 27.0);
Tailwind
colors: {
  custom: {
    50: '#d07569',
    500: '#b13731',
    950: '#000000',
  },
}
SCSS
$custom: #b13731;
$custom-light: #d07569;
$custom-dark: #000000;
JSON
{
  "hex": "#b13731",
  "rgb": {
    "r": 177,
    "g": 55,
    "b": 49
  },
  "hsl": {
    "h": 2.813,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.51619,
    "c": 0.1592,
    "h": 27
  },
  "luminance": 0.12301
}

Semantic roles & 50–950 ramp

primary
#B13731
secondary
#79C1C5
accent
#D9E048
background
#FDF7F6
surface
#FBEDEB
border
#D4C8C6
text
#150906
muted
#837B7A

Preview Lab

Preview with #B13731

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

Preview Lab → · Contrast checker → · Palette generator →

#B13731 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva