#B63737#B63737

#B63737 is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.6% C 0.164 H 24.8°. Best body text is #FFFFFF at 5.85:1 contrast (WCAG AA passes).

Color values

HEX	#B63737
RGB	rgb(182, 55, 55)
HSL	hsl(0, 54%, 46%)
HSV	hsv(0, 70%, 71%)
CMYK	cmyk(0%, 69.8%, 69.8%, 28.6%)
CIE-LAB	lab(42.70, 50.93, 29.63)
CIE-LCH	lch(42.70, 58.92, 30.19°)
OKLab	oklab(52.57% 0.1486 0.0685)
OKLCH	oklch(52.57% 0.164 24.8)
XYZ	xyz(21.3495, 12.9564, 4.9904)
Luminance	0.1295 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63737 #37B6B6

analogous

#B63777 #B63737 #B67737

triadic

#B63737 #37B637 #3737B6

tetradic

#B63737 #77B637 #37B6B6 #7737B6

square

#B63737 #77B637 #37B6B6 #7737B6

split-complementary

#B63737 #37B677 #3777B6

monochromatic

#581B1B #872929 #B63737 #CE5C5C #DC8B8B

Accessibility & contrast

On white

5.85

#B63737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.59

#B63737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63737

5.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63737	#FFFFFF	#000000	##FFFFFF
##B63737	1.00	5.85	3.59	5.85
#FFFFFF	5.85	1.00	21.00	1.00
#000000	3.59	21.00	1.00	21.00
##FFFFFF	5.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5336

Deuteranopia (green-blind)

#7A6F33

Tritanopia (blue-blind)

#C80E39

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b63737;
/* rgb */ color: rgb(182, 55, 55);
/* oklch */ color: oklch(52.6% 0.164 24.8);

Tailwind

colors: {
  custom: {
    50: '#d4766e',
    500: '#b63737',
    950: '#000000',
  },
}

SCSS

$custom: #b63737;
$custom-light: #d4766e;
$custom-dark: #000000;

JSON

{
  "hex": "#b63737",
  "rgb": {
    "r": 182,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 53.586,
    "l": 46.471
  },
  "oklch": {
    "l": 0.52565,
    "c": 0.16366,
    "h": 24.8
  },
  "luminance": 0.12953
}

Semantic roles & 50–950 ramp

primary

#B63737

secondary

#82C6C6

accent

#DDDD4B

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #B63737

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

Preview Lab → · Contrast checker → · Palette generator →