#B33A37#B33A37

#B33A37 is a mid, vivid red. Relative luminance 0.129; OKLCH L 52.4% C 0.157 H 25.6°. Best body text is #FFFFFF at 5.87:1 contrast (WCAG AA passes).

Color values

HEX	#B33A37
RGB	rgb(179, 58, 55)
HSL	hsl(1, 53%, 46%)
HSV	hsv(1, 69%, 70%)
CMYK	cmyk(0%, 67.6%, 69.3%, 29.8%)
CIE-LAB	lab(42.59, 48.72, 29.38)
CIE-LCH	lch(42.59, 56.89, 31.09°)
OKLab	oklab(52.39% 0.142 0.0681)
OKLCH	oklch(52.39% 0.157 25.6)
XYZ	xyz(20.7953, 12.8886, 5.0064)
Luminance	0.1289 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33A37 #37B0B3

analogous

#B33772 #B33A37 #B37837

triadic

#B33A37 #37B33A #3A37B3

tetradic

#B33A37 #72B337 #37B0B3 #7837B3

square

#B33A37 #72B337 #37B0B3 #7837B3

split-complementary

#B33A37 #37B378 #3772B3

monochromatic

#551C1A #842B29 #B33A37 #CD5D5B #DB8B8A

Accessibility & contrast

On white

5.87

#B33A37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.58

#B33A37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33A37

5.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33A37	#FFFFFF	#000000	##FFFFFF
##B33A37	1.00	5.87	3.58	5.87
#FFFFFF	5.87	1.00	21.00	1.00
#000000	3.58	21.00	1.00	21.00
##FFFFFF	5.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5436

Deuteranopia (green-blind)

#7A6E33

Tritanopia (blue-blind)

#C5193A

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b33a37;
/* rgb */ color: rgb(179, 58, 55);
/* oklch */ color: oklch(52.4% 0.157 25.6);

Tailwind

colors: {
  custom: {
    50: '#d1776e',
    500: '#b33a37',
    950: '#000000',
  },
}

SCSS

$custom: #b33a37;
$custom-light: #d1776e;
$custom-dark: #000000;

JSON

{
  "hex": "#b33a37",
  "rgb": {
    "r": 179,
    "g": 58,
    "b": 55
  },
  "hsl": {
    "h": 1.452,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.52387,
    "c": 0.15749,
    "h": 25.6
  },
  "luminance": 0.12886
}

Semantic roles & 50–950 ramp

primary

#B33A37

secondary

#81C3C5

accent

#D9DC4B

background

#FDF7F6

surface

#FBEEEB

border

#D4C9C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #B33A37

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

Preview Lab → · Contrast checker → · Palette generator →