#B33837#B33837

#B33837 is a mid, vivid red. Relative luminance 0.127; OKLCH L 52.2% C 0.159 H 25.0°. Best body text is #FFFFFF at 5.94:1 contrast (WCAG AA passes).

Color values

HEX	#B33837
RGB	rgb(179, 56, 55)
HSL	hsl(0, 53%, 46%)
HSV	hsv(0, 69%, 70%)
CMYK	cmyk(0%, 68.7%, 69.3%, 29.8%)
CIE-LAB	lab(42.29, 49.54, 29.01)
CIE-LCH	lch(42.29, 57.41, 30.35°)
OKLab	oklab(52.16% 0.1446 0.0673)
OKLCH	oklch(52.16% 0.159 25)
XYZ	xyz(20.6964, 12.6909, 4.9735)
Luminance	0.1269 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33837 #37B2B3

analogous

#B33774 #B33837 #B37637

triadic

#B33837 #37B338 #3837B3

tetradic

#B33837 #74B337 #37B2B3 #7637B3

square

#B33837 #74B337 #37B2B3 #7637B3

split-complementary

#B33837 #37B376 #3774B3

monochromatic

#551B1A #842929 #B33837 #CD5C5B #DB8A8A

Accessibility & contrast

On white

5.94

#B33837 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#B33837 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33837

5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33837	#FFFFFF	#000000	##FFFFFF
##B33837	1.00	5.94	3.54	5.94
#FFFFFF	5.94	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A5336

Deuteranopia (green-blind)

#796E33

Tritanopia (blue-blind)

#C51439

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b33837;
/* rgb */ color: rgb(179, 56, 55);
/* oklch */ color: oklch(52.2% 0.159 25.0);

Tailwind

colors: {
  custom: {
    50: '#d1766e',
    500: '#b33837',
    950: '#000000',
  },
}

SCSS

$custom: #b33837;
$custom-light: #d1766e;
$custom-dark: #000000;

JSON

{
  "hex": "#b33837",
  "rgb": {
    "r": 179,
    "g": 56,
    "b": 55
  },
  "hsl": {
    "h": 0.484,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.52161,
    "c": 0.15949,
    "h": 25
  },
  "luminance": 0.12688
}

Semantic roles & 50–950 ramp

primary

#B33837

secondary

#81C5C5

accent

#DBDC4B

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #B33837

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

Preview Lab → · Contrast checker → · Palette generator →