#B33931#B33931

#B33931 is a mid, vivid red. Relative luminance 0.127; OKLCH L 52.2% C 0.159 H 27.7°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#B33931
RGB	rgb(179, 57, 49)
HSL	hsl(4, 57%, 45%)
HSV	hsv(4, 73%, 70%)
CMYK	cmyk(0%, 68.2%, 72.6%, 29.8%)
CIE-LAB	lab(42.36, 48.83, 32.63)
CIE-LCH	lch(42.36, 58.73, 33.75°)
OKLab	oklab(52.19% 0.1411 0.0741)
OKLCH	oklch(52.19% 0.159 27.7)
XYZ	xyz(20.6102, 12.7347, 4.2779)
Luminance	0.1273 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33931 #31ABB3

analogous

#B3316A #B33931 #B37A31

triadic

#B33931 #31B339 #3931B3

tetradic

#B33931 #6AB331 #31ABB3 #7A31B3

square

#B33931 #6AB331 #31ABB3 #7A31B3

split-complementary

#B33931 #31B37A #316AB3

monochromatic

#531A17 #832A24 #B33931 #D05952 #DD8782

Accessibility & contrast

On white

5.92

#B33931 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#B33931 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33931

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33931	#FFFFFF	#000000	##FFFFFF
##B33931	1.00	5.92	3.55	5.92
#FFFFFF	5.92	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B532F

Deuteranopia (green-blind)

#7A6E2D

Tritanopia (blue-blind)

#C51538

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b33931;
/* rgb */ color: rgb(179, 57, 49);
/* oklch */ color: oklch(52.2% 0.159 27.7);

Tailwind

colors: {
  custom: {
    50: '#d27669',
    500: '#b33931',
    950: '#000000',
  },
}

SCSS

$custom: #b33931;
$custom-light: #d27669;
$custom-dark: #000000;

JSON

{
  "hex": "#b33931",
  "rgb": {
    "r": 179,
    "g": 57,
    "b": 49
  },
  "hsl": {
    "h": 3.692,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.52185,
    "c": 0.1594,
    "h": 27.7
  },
  "luminance": 0.12732
}

Semantic roles & 50–950 ramp

primary

#B33931

secondary

#7AC1C6

accent

#D7E048

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B33931

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

Preview Lab → · Contrast checker → · Palette generator →