#B33731#B33731

#B33731 is a mid, vivid red. Relative luminance 0.125; OKLCH L 52.0% C 0.161 H 27.1°. Best body text is #FFFFFF at 5.99:1 contrast (WCAG AA passes).

Color values

HEX	#B33731
RGB	rgb(179, 55, 49)
HSL	hsl(3, 57%, 45%)
HSV	hsv(3, 73%, 70%)
CMYK	cmyk(0%, 69.3%, 72.6%, 29.8%)
CIE-LAB	lab(42.06, 49.65, 32.29)
CIE-LCH	lch(42.06, 59.22, 33.04°)
OKLab	oklab(51.96% 0.1437 0.0734)
OKLCH	oklch(51.96% 0.161 27.1)
XYZ	xyz(20.5132, 12.5409, 4.2456)
Luminance	0.1254 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33731 #31ADB3

analogous

#B3316C #B33731 #B37831

triadic

#B33731 #31B337 #3731B3

tetradic

#B33731 #6CB331 #31ADB3 #7831B3

square

#B33731 #6CB331 #31ADB3 #7831B3

split-complementary

#B33731 #31B378 #316CB3

monochromatic

#531917 #832824 #B33731 #D05752 #DD8682

Accessibility & contrast

On white

5.99

#B33731 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.51

#B33731 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33731

5.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33731	#FFFFFF	#000000	##FFFFFF
##B33731	1.00	5.99	3.51	5.99
#FFFFFF	5.99	1.00	21.00	1.00
#000000	3.51	21.00	1.00	21.00
##FFFFFF	5.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A522F

Deuteranopia (green-blind)

#796D2D

Tritanopia (blue-blind)

#C50F37

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b33731;
/* rgb */ color: rgb(179, 55, 49);
/* oklch */ color: oklch(52.0% 0.161 27.1);

Tailwind

colors: {
  custom: {
    50: '#d27569',
    500: '#b33731',
    950: '#000000',
  },
}

SCSS

$custom: #b33731;
$custom-light: #d27569;
$custom-dark: #000000;

JSON

{
  "hex": "#b33731",
  "rgb": {
    "r": 179,
    "g": 55,
    "b": 49
  },
  "hsl": {
    "h": 2.769,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.51962,
    "c": 0.16132,
    "h": 27.1
  },
  "luminance": 0.12538
}

Semantic roles & 50–950 ramp

primary

#B33731

secondary

#7AC2C6

accent

#D9E048

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B33731

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

Preview Lab → · Contrast checker → · Palette generator →