#B63537#B63537

#B63537 is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.4% C 0.166 H 24.2°. Best body text is #FFFFFF at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#B63537
RGB	rgb(182, 53, 55)
HSL	hsl(359, 55%, 46%)
HSV	hsv(359, 71%, 71%)
CMYK	cmyk(0%, 70.9%, 69.8%, 28.6%)
CIE-LAB	lab(42.42, 51.71, 29.29)
CIE-LCH	lch(42.42, 59.43, 29.53°)
OKLab	oklab(52.35% 0.1511 0.0678)
OKLCH	oklch(52.35% 0.166 24.2)
XYZ	xyz(21.2564, 12.7703, 4.9593)
Luminance	0.1277 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63537 #35B6B4

analogous

#B63577 #B63537 #B67335

triadic

#B63537 #37B635 #3537B6

tetradic

#B63537 #77B635 #35B6B4 #7335B6

square

#B63537 #77B635 #35B6B4 #7335B6

split-complementary

#B63537 #35B673 #3577B6

monochromatic

#57191A #872729 #B63537 #CF595B #DD898A

Accessibility & contrast

On white

5.91

#B63537 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#B63537 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63537

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63537	#FFFFFF	#000000	##FFFFFF
##B63537	1.00	5.91	3.55	5.91
#FFFFFF	5.91	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595236

Deuteranopia (green-blind)

#7A6E33

Tritanopia (blue-blind)

#C80737

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b63537;
/* rgb */ color: rgb(182, 53, 55);
/* oklch */ color: oklch(52.4% 0.166 24.2);

Tailwind

colors: {
  custom: {
    50: '#d4756e',
    500: '#b63537',
    950: '#000000',
  },
}

SCSS

$custom: #b63537;
$custom-light: #d4756e;
$custom-dark: #000000;

JSON

{
  "hex": "#b63537",
  "rgb": {
    "r": 182,
    "g": 53,
    "b": 55
  },
  "hsl": {
    "h": 359.07,
    "s": 54.894,
    "l": 46.078
  },
  "oklch": {
    "l": 0.52354,
    "c": 0.16558,
    "h": 24.2
  },
  "luminance": 0.12767
}

Semantic roles & 50–950 ramp

primary

#B63537

secondary

#80C7C6

accent

#DEDC4A

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #B63537

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

Preview Lab → · Contrast checker → · Palette generator →