#B33137#B33137

#B33137 is a mid, vivid red. Relative luminance 0.121; OKLCH L 51.4% C 0.166 H 22.9°. Best body text is #FFFFFF at 6.16:1 contrast (WCAG AA passes).

Color values

HEX	#B33137
RGB	rgb(179, 49, 55)
HSL	hsl(357, 57%, 45%)
HSV	hsv(357, 73%, 70%)
CMYK	cmyk(0%, 72.6%, 69.3%, 29.8%)
CIE-LAB	lab(41.31, 52.24, 27.83)
CIE-LCH	lch(41.31, 59.19, 28.04°)
OKLab	oklab(51.43% 0.1532 0.0647)
OKLCH	oklch(51.43% 0.166 22.9)
XYZ	xyz(20.3805, 12.0592, 4.8682)
Luminance	0.1206 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33137 #31B3AD

analogous

#B33178 #B33137 #B36C31

triadic

#B33137 #37B331 #3137B3

tetradic

#B33137 #78B331 #31B3AD #6C31B3

square

#B33137 #78B331 #31B3AD #6C31B3

split-complementary

#B33137 #31B36C #3178B3

monochromatic

#531719 #832428 #B33137 #D05257 #DD8286

Accessibility & contrast

On white

6.16

#B33137 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.41

#B33137 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33137

6.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33137	#FFFFFF	#000000	##FFFFFF
##B33137	1.00	6.16	3.41	6.16
#FFFFFF	6.16	1.00	21.00	1.00
#000000	3.41	21.00	1.00	21.00
##FFFFFF	6.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#565036

Deuteranopia (green-blind)

#776C33

Tritanopia (blue-blind)

#C50035

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #b33137;
/* rgb */ color: rgb(179, 49, 55);
/* oklch */ color: oklch(51.4% 0.166 22.9);

Tailwind

colors: {
  custom: {
    50: '#d2736e',
    500: '#b33137',
    950: '#000000',
  },
}

SCSS

$custom: #b33137;
$custom-light: #d2736e;
$custom-dark: #000000;

JSON

{
  "hex": "#b33137",
  "rgb": {
    "r": 179,
    "g": 49,
    "b": 55
  },
  "hsl": {
    "h": 357.231,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.51427,
    "c": 0.16625,
    "h": 22.9
  },
  "luminance": 0.12056
}

Semantic roles & 50–950 ramp

primary

#B33137

secondary

#7AC6C2

accent

#E0D948

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #B33137

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

Preview Lab → · Contrast checker → · Palette generator →