#B63B37#B63B37

#B63B37 is a mid, vivid red. Relative luminance 0.133; OKLCH L 53.0% C 0.160 H 26.0°. Best body text is #FFFFFF at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#B63B37
RGB	rgb(182, 59, 55)
HSL	hsl(2, 54%, 46%)
HSV	hsv(2, 70%, 71%)
CMYK	cmyk(0%, 67.6%, 69.8%, 28.6%)
CIE-LAB	lab(43.29, 49.32, 30.33)
CIE-LCH	lch(43.29, 57.90, 31.59°)
OKLab	oklab(53.01% 0.1435 0.0701)
OKLCH	oklch(53.01% 0.16 26)
XYZ	xyz(21.5473, 13.3520, 5.0563)
Luminance	0.1335 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63B37 #37B2B6

analogous

#B63773 #B63B37 #B67B37

triadic

#B63B37 #37B63B #3B37B6

tetradic

#B63B37 #73B637 #37B2B6 #7B37B6

square

#B63B37 #73B637 #37B2B6 #7B37B6

split-complementary

#B63B37 #37B67B #3773B6

monochromatic

#581D1B #872C29 #B63B37 #CE605C #DC8E8B

Accessibility & contrast

On white

5.72

#B63B37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#B63B37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63B37

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63B37	#FFFFFF	#000000	##FFFFFF
##B63B37	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)

#5D5536

Deuteranopia (green-blind)

#7C7033

Tritanopia (blue-blind)

#C8193B

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b63b37;
/* rgb */ color: rgb(182, 59, 55);
/* oklch */ color: oklch(53.0% 0.160 26.0);

Tailwind

colors: {
  custom: {
    50: '#d3786e',
    500: '#b63b37',
    950: '#000000',
  },
}

SCSS

$custom: #b63b37;
$custom-light: #d3786e;
$custom-dark: #000000;

JSON

{
  "hex": "#b63b37",
  "rgb": {
    "r": 182,
    "g": 59,
    "b": 55
  },
  "hsl": {
    "h": 1.89,
    "s": 53.586,
    "l": 46.471
  },
  "oklch": {
    "l": 0.53007,
    "c": 0.15972,
    "h": 26
  },
  "luminance": 0.13349
}

Semantic roles & 50–950 ramp

primary

#B63B37

secondary

#82C4C6

accent

#D8DD4B

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #B63B37

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

Preview Lab → · Contrast checker → · Palette generator →