#B33A31#B33A31

#B33A31 is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.3% C 0.158 H 28.1°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX#B33A31
RGBrgb(179, 58, 49)
HSLhsl(4, 57%, 45%)
HSVhsv(4, 73%, 70%)
CMYKcmyk(0%, 67.6%, 72.6%, 29.8%)
CIE-LABlab(42.51, 48.42, 32.80)
CIE-LCHlch(42.51, 58.49, 34.12°)
OKLaboklab(52.3% 0.1398 0.0745)
OKLCHoklch(52.3% 0.158 28.1)
XYZxyz(20.6601, 12.8346, 4.2946)
Luminance0.1283 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#B33A31 #31AAB3
analogous
#B33169 #B33A31 #B37B31
triadic
#B33A31 #31B33A #3A31B3
tetradic
#B33A31 #69B331 #31AAB3 #7B31B3
square
#B33A31 #69B331 #31AAB3 #7B31B3
split-complementary
#B33A31 #31B37B #3169B3
monochromatic
#531B17 #832A24 #B33A31 #D05A52 #DD8882

Accessibility & contrast

On white

5.89
#B33A31 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.57
#B33A31 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33A31
5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##B33A31#FFFFFF#000000##FFFFFF
##B33A311.005.893.575.89
#FFFFFF5.891.0021.001.00
#0000003.5721.001.0021.00
##FFFFFF5.891.0021.001.00

Color blindness preview

Protanopia (red-blind)
#5C542F
Deuteranopia (green-blind)
#7A6E2D
Tritanopia (blue-blind)
#C51739
Achromatopsia (no color)
#646464

Design tokens & code

CSS
--color: #b33a31;
/* rgb */ color: rgb(179, 58, 49);
/* oklch */ color: oklch(52.3% 0.158 28.1);
Tailwind
colors: {
  custom: {
    50: '#d17769',
    500: '#b33a31',
    950: '#000000',
  },
}
SCSS
$custom: #b33a31;
$custom-light: #d17769;
$custom-dark: #000000;
JSON
{
  "hex": "#b33a31",
  "rgb": {
    "r": 179,
    "g": 58,
    "b": 49
  },
  "hsl": {
    "h": 4.154,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.52299,
    "c": 0.15843,
    "h": 28.1
  },
  "luminance": 0.12832
}

Semantic roles & 50–950 ramp

primary
#B33A31
secondary
#7AC1C6
accent
#D6E048
background
#FDF7F6
surface
#FBEEEB
border
#D4C9C6
text
#150906
muted
#837B7A

Preview Lab

Preview with #B33A31

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

Preview Lab → · Contrast checker → · Palette generator →

#B33A31 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva