#B33737#B33737

#B33737 is a mid, vivid red. Relative luminance 0.126; OKLCH L 52.1% C 0.160 H 24.6°. Best body text is #FFFFFF at 5.97:1 contrast (WCAG AA passes).

Color values

HEX	#B33737
RGB	rgb(179, 55, 55)
HSL	hsl(0, 53%, 46%)
HSV	hsv(0, 69%, 70%)
CMYK	cmyk(0%, 69.3%, 69.3%, 29.8%)
CIE-LAB	lab(42.15, 49.94, 28.84)
CIE-LCH	lch(42.15, 57.67, 30.00°)
OKLab	oklab(52.05% 0.1459 0.0669)
OKLCH	oklch(52.05% 0.16 24.6)
XYZ	xyz(20.6484, 12.5949, 4.9575)
Luminance	0.1259 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33737 #37B3B3

analogous

#B33775 #B33737 #B37537

triadic

#B33737 #37B337 #3737B3

tetradic

#B33737 #75B337 #37B3B3 #7537B3

square

#B33737 #75B337 #37B3B3 #7537B3

split-complementary

#B33737 #37B375 #3775B3

monochromatic

#551A1A #842929 #B33737 #CD5B5B #DB8A8A

Accessibility & contrast

On white

5.97

#B33737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#B33737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33737

5.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33737	#FFFFFF	#000000	##FFFFFF
##B33737	1.00	5.97	3.52	5.97
#FFFFFF	5.97	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595336

Deuteranopia (green-blind)

#796D33

Tritanopia (blue-blind)

#C51238

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b33737;
/* rgb */ color: rgb(179, 55, 55);
/* oklch */ color: oklch(52.1% 0.160 24.6);

Tailwind

colors: {
  custom: {
    50: '#d1766e',
    500: '#b33737',
    950: '#000000',
  },
}

SCSS

$custom: #b33737;
$custom-light: #d1766e;
$custom-dark: #000000;

JSON

{
  "hex": "#b33737",
  "rgb": {
    "r": 179,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.52051,
    "c": 0.16048,
    "h": 24.6
  },
  "luminance": 0.12592
}

Semantic roles & 50–950 ramp

primary

#B33737

secondary

#81C5C5

accent

#DCDC4B

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #B33737

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

Preview Lab → · Contrast checker → · Palette generator →