#B33F31#B33F31

#B33F31 is a mid, vivid red. Relative luminance 0.134; OKLCH L 52.9% C 0.154 H 29.9°. Best body text is #FFFFFF at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#B33F31
RGB	rgb(179, 63, 49)
HSL	hsl(6, 57%, 45%)
HSV	hsv(6, 73%, 70%)
CMYK	cmyk(0%, 64.8%, 72.6%, 29.8%)
CIE-LAB	lab(43.31, 46.28, 33.71)
CIE-LCH	lch(43.31, 57.26, 36.07°)
OKLab	oklab(52.89% 0.1331 0.0765)
OKLCH	oklch(52.89% 0.154 29.9)
XYZ	xyz(20.9245, 13.3634, 4.3827)
Luminance	0.1336 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33F31 #31A5B3

analogous

#B33164 #B33F31 #B38031

triadic

#B33F31 #31B33F #3F31B3

tetradic

#B33F31 #64B331 #31A5B3 #8031B3

square

#B33F31 #64B331 #31A5B3 #8031B3

split-complementary

#B33F31 #31B380 #3164B3

monochromatic

#531D17 #832E24 #B33F31 #D05F52 #DD8C82

Accessibility & contrast

On white

5.72

#B33F31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#B33F31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33F31

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33F31	#FFFFFF	#000000	##FFFFFF
##B33F31	1.00	5.72	3.67	5.72
#FFFFFF	5.72	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F562F

Deuteranopia (green-blind)

#7C702D

Tritanopia (blue-blind)

#C5213C

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b33f31;
/* rgb */ color: rgb(179, 63, 49);
/* oklch */ color: oklch(52.9% 0.154 29.9);

Tailwind

colors: {
  custom: {
    50: '#d17a6a',
    500: '#b33f31',
    950: '#000000',
  },
}

SCSS

$custom: #b33f31;
$custom-light: #d17a6a;
$custom-dark: #000000;

JSON

{
  "hex": "#b33f31",
  "rgb": {
    "r": 179,
    "g": 63,
    "b": 49
  },
  "hsl": {
    "h": 6.462,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.52894,
    "c": 0.15351,
    "h": 29.9
  },
  "luminance": 0.1336
}

Semantic roles & 50–950 ramp

primary

#B33F31

secondary

#7ABEC6

accent

#D0E048

background

#FDF7F6

surface

#FBEEEB

border

#D4C9C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B33F31

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

Preview Lab → · Contrast checker → · Palette generator →