#B33937#B33937

#B33937 is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.3% C 0.158 H 25.3°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#B33937
RGB	rgb(179, 57, 55)
HSL	hsl(1, 53%, 46%)
HSV	hsv(1, 69%, 70%)
CMYK	cmyk(0%, 68.2%, 69.3%, 29.8%)
CIE-LAB	lab(42.44, 49.13, 29.19)
CIE-LCH	lch(42.44, 57.15, 30.72°)
OKLab	oklab(52.27% 0.1433 0.0677)
OKLCH	oklch(52.27% 0.158 25.3)
XYZ	xyz(20.7453, 12.7888, 4.9898)
Luminance	0.1279 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33937 #37B1B3

analogous

#B33773 #B33937 #B37737

triadic

#B33937 #37B339 #3937B3

tetradic

#B33937 #73B337 #37B1B3 #7737B3

square

#B33937 #73B337 #37B1B3 #7737B3

split-complementary

#B33937 #37B377 #3773B3

monochromatic

#551B1A #842A29 #B33937 #CD5D5B #DB8B8A

Accessibility & contrast

On white

5.90

#B33937 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#B33937 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33937

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33937	#FFFFFF	#000000	##FFFFFF
##B33937	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5436

Deuteranopia (green-blind)

#796E33

Tritanopia (blue-blind)

#C5173A

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b33937;
/* rgb */ color: rgb(179, 57, 55);
/* oklch */ color: oklch(52.3% 0.158 25.3);

Tailwind

colors: {
  custom: {
    50: '#d1776e',
    500: '#b33937',
    950: '#000000',
  },
}

SCSS

$custom: #b33937;
$custom-light: #d1776e;
$custom-dark: #000000;

JSON

{
  "hex": "#b33937",
  "rgb": {
    "r": 179,
    "g": 57,
    "b": 55
  },
  "hsl": {
    "h": 0.968,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.52273,
    "c": 0.15849,
    "h": 25.3
  },
  "luminance": 0.12786
}

Semantic roles & 50–950 ramp

primary

#B33937

secondary

#81C4C5

accent

#DADC4B

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #B33937

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

Preview Lab → · Contrast checker → · Palette generator →