#B63837#B63837

#B63837 is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.7% C 0.163 H 25.1°. Best body text is #FFFFFF at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#B63837
RGB	rgb(182, 56, 55)
HSL	hsl(0, 54%, 46%)
HSV	hsv(0, 70%, 71%)
CMYK	cmyk(0%, 69.2%, 69.8%, 28.6%)
CIE-LAB	lab(42.84, 50.54, 29.80)
CIE-LCH	lch(42.84, 58.67, 30.53°)
OKLab	oklab(52.67% 0.1474 0.0689)
OKLCH	oklch(52.67% 0.163 25.1)
XYZ	xyz(21.3975, 13.0524, 5.0063)
Luminance	0.1305 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63837 #37B5B6

analogous

#B63776 #B63837 #B67837

triadic

#B63837 #37B638 #3837B6

tetradic

#B63837 #76B637 #37B5B6 #7837B6

square

#B63837 #76B637 #37B5B6 #7837B6

split-complementary

#B63837 #37B678 #3776B6

monochromatic

#581B1B #872A29 #B63837 #CE5D5C #DC8C8B

Accessibility & contrast

On white

5.82

#B63837 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.61

#B63837 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63837

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63837	#FFFFFF	#000000	##FFFFFF
##B63837	1.00	5.82	3.61	5.82
#FFFFFF	5.82	1.00	21.00	1.00
#000000	3.61	21.00	1.00	21.00
##FFFFFF	5.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5436

Deuteranopia (green-blind)

#7B6F33

Tritanopia (blue-blind)

#C81139

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b63837;
/* rgb */ color: rgb(182, 56, 55);
/* oklch */ color: oklch(52.7% 0.163 25.1);

Tailwind

colors: {
  custom: {
    50: '#d4766e',
    500: '#b63837',
    950: '#000000',
  },
}

SCSS

$custom: #b63837;
$custom-light: #d4766e;
$custom-dark: #000000;

JSON

{
  "hex": "#b63837",
  "rgb": {
    "r": 182,
    "g": 56,
    "b": 55
  },
  "hsl": {
    "h": 0.472,
    "s": 53.586,
    "l": 46.471
  },
  "oklch": {
    "l": 0.52673,
    "c": 0.16268,
    "h": 25.1
  },
  "luminance": 0.13049
}

Semantic roles & 50–950 ramp

primary

#B63837

secondary

#82C6C6

accent

#DCDD4B

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #B63837

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

Preview Lab → · Contrast checker → · Palette generator →