#B33B31#B33B31

#B33B31 is a mid, vivid red. Relative luminance 0.129; OKLCH L 52.4% C 0.157 H 28.4°. Best body text is #FFFFFF at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#B33B31
RGB	rgb(179, 59, 49)
HSL	hsl(5, 57%, 45%)
HSV	hsv(5, 73%, 70%)
CMYK	cmyk(0%, 67%, 72.6%, 29.8%)
CIE-LAB	lab(42.67, 48.00, 32.98)
CIE-LCH	lch(42.67, 58.24, 34.49°)
OKLab	oklab(52.42% 0.1385 0.0749)
OKLCH	oklch(52.42% 0.157 28.4)
XYZ	xyz(20.7110, 12.9364, 4.3115)
Luminance	0.1293 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33B31 #31A9B3

analogous

#B33168 #B33B31 #B37C31

triadic

#B33B31 #31B33B #3B31B3

tetradic

#B33B31 #68B331 #31A9B3 #7C31B3

square

#B33B31 #68B331 #31A9B3 #7C31B3

split-complementary

#B33B31 #31B37C #3168B3

monochromatic

#531B17 #832B24 #B33B31 #D05B52 #DD8982

Accessibility & contrast

On white

5.86

#B33B31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.59

#B33B31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33B31

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33B31	#FFFFFF	#000000	##FFFFFF
##B33B31	1.00	5.86	3.59	5.86
#FFFFFF	5.86	1.00	21.00	1.00
#000000	3.59	21.00	1.00	21.00
##FFFFFF	5.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D542F

Deuteranopia (green-blind)

#7A6E2D

Tritanopia (blue-blind)

#C5193A

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b33b31;
/* rgb */ color: rgb(179, 59, 49);
/* oklch */ color: oklch(52.4% 0.157 28.4);

Tailwind

colors: {
  custom: {
    50: '#d17869',
    500: '#b33b31',
    950: '#000000',
  },
}

SCSS

$custom: #b33b31;
$custom-light: #d17869;
$custom-dark: #000000;

JSON

{
  "hex": "#b33b31",
  "rgb": {
    "r": 179,
    "g": 59,
    "b": 49
  },
  "hsl": {
    "h": 4.615,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.52415,
    "c": 0.15745,
    "h": 28.4
  },
  "luminance": 0.12933
}

Semantic roles & 50–950 ramp

primary

#B33B31

secondary

#7AC0C6

accent

#D5E048

background

#FDF7F6

surface

#FBEEEB

border

#D4C9C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B33B31

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

Preview Lab → · Contrast checker → · Palette generator →