#B33F37#B33F37

#B33F37 is a mid, vivid red. Relative luminance 0.134; OKLCH L 53.0% C 0.152 H 27.4°. Best body text is #FFFFFF at 5.70:1 contrast (WCAG AA passes).

Color values

HEX#B33F37
RGBrgb(179, 63, 55)
HSLhsl(4, 53%, 46%)
HSVhsv(4, 69%, 70%)
CMYKcmyk(0%, 64.8%, 69.3%, 29.8%)
CIE-LABlab(43.39, 46.58, 30.32)
CIE-LCHlch(43.39, 55.58, 33.06°)
OKLaboklab(52.98% 0.1353 0.0702)
OKLCHoklch(52.98% 0.152 27.4)
XYZxyz(21.0597, 13.4175, 5.0946)
Luminance0.1341 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#B33F37 #37ABB3
analogous
#B3376D #B33F37 #B37D37
triadic
#B33F37 #37B33F #3F37B3
tetradic
#B33F37 #6DB337 #37ABB3 #7D37B3
square
#B33F37 #6DB337 #37ABB3 #7D37B3
split-complementary
#B33F37 #37B37D #376DB3
monochromatic
#551E1A #842F29 #B33F37 #CD625B #DB8F8A

Accessibility & contrast

On white

5.70
#B33F37 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.68
#B33F37 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33F37
5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##B33F37#FFFFFF#000000##FFFFFF
##B33F371.005.703.685.70
#FFFFFF5.701.0021.001.00
#0000003.6821.001.0021.00
##FFFFFF5.701.0021.001.00

Color blindness preview

Protanopia (red-blind)
#5E5735
Deuteranopia (green-blind)
#7B7034
Tritanopia (blue-blind)
#C5233E
Achromatopsia (no color)
#666666

Design tokens & code

CSS
--color: #b33f37;
/* rgb */ color: rgb(179, 63, 55);
/* oklch */ color: oklch(53.0% 0.152 27.4);
Tailwind
colors: {
  custom: {
    50: '#d17a6e',
    500: '#b33f37',
    950: '#000000',
  },
}
SCSS
$custom: #b33f37;
$custom-light: #d17a6e;
$custom-dark: #000000;
JSON
{
  "hex": "#b33f37",
  "rgb": {
    "r": 179,
    "g": 63,
    "b": 55
  },
  "hsl": {
    "h": 3.871,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.5298,
    "c": 0.1524,
    "h": 27.4
  },
  "luminance": 0.13415
}

Semantic roles & 50–950 ramp

primary
#B33F37
secondary
#81C1C5
accent
#D3DC4B
background
#FDF7F6
surface
#FBEEEC
border
#D4C9C7
text
#150A07
muted
#837C7A

Preview Lab

Preview with #B33F37

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

Preview Lab → · Contrast checker → · Palette generator →

#B33F37 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva