#B31C20#B31C20

#B31C20 is a mid, vivid red. Relative luminance 0.105; OKLCH L 49.4% C 0.185 H 26.4°. Best body text is #FFFFFF at 6.77:1 contrast (WCAG AA passes).

Color values

HEX#B31C20
RGBrgb(179, 28, 32)
HSLhsl(358, 73%, 41%)
HSVhsv(358, 84%, 70%)
CMYKcmyk(0%, 84.4%, 82.1%, 29.8%)
CIE-LABlab(38.76, 57.68, 38.48)
CIE-LCHlch(38.76, 69.34, 33.71°)
OKLaboklab(49.44% 0.1654 0.0821)
OKLCHoklch(49.44% 0.185 26.4)
XYZxyz(19.2688, 10.5217, 2.3826)
Luminance0.1052 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#B31C20 #1CB3AF
analogous
#B31C6B #B31C20 #B3641C
triadic
#B31C20 #20B31C #1C20B3
tetradic
#B31C20 #6BB31C #1CB3AF #641CB3
square
#B31C20 #6BB31C #1CB3AF #641CB3
split-complementary
#B31C20 #1CB364 #1C6BB3
monochromatic
#490B0D #7E1417 #B31C20 #DE2E33 #E76366

Accessibility & contrast

On white

6.77
#B31C20 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.10
#B31C20 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31C20
6.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##B31C20#FFFFFF#000000##FFFFFF
##B31C201.006.773.106.77
#FFFFFF6.771.0021.001.00
#0000003.1021.001.0021.00
##FFFFFF6.771.0021.001.00

Color blindness preview

Protanopia (red-blind)
#4F471E
Deuteranopia (green-blind)
#736718
Tritanopia (blue-blind)
#C60020
Achromatopsia (no color)
#5B5B5B

Design tokens & code

CSS
--color: #b31c20;
/* rgb */ color: rgb(179, 28, 32);
/* oklch */ color: oklch(49.4% 0.185 26.4);
Tailwind
colors: {
  custom: {
    50: '#d46a5c',
    500: '#b31c20',
    950: '#000000',
  },
}
SCSS
$custom: #b31c20;
$custom-light: #d46a5c;
$custom-dark: #000000;
JSON
{
  "hex": "#b31c20",
  "rgb": {
    "r": 179,
    "g": 28,
    "b": 32
  },
  "hsl": {
    "h": 358.411,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.49444,
    "c": 0.18463,
    "h": 26.4
  },
  "luminance": 0.10518
}

Semantic roles & 50–950 ramp

primary
#B31C20
secondary
#5FCBC8
accent
#F0EB38
background
#FEF6F5
surface
#FDECE9
border
#D5C7C5
text
#160704
muted
#847A79

Preview Lab

Preview with #B31C20

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

Preview Lab → · Contrast checker → · Palette generator →

#B31C20 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva