#B63B3A#B63B3A

#B63B3A is a mid, vivid red. Relative luminance 0.134; OKLCH L 53.1% C 0.159 H 24.8°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#B63B3A
RGB	rgb(182, 59, 58)
HSL	hsl(0, 52%, 47%)
HSV	hsv(0, 68%, 71%)
CMYK	cmyk(0%, 67.6%, 68.1%, 28.6%)
CIE-LAB	lab(43.33, 49.48, 28.61)
CIE-LCH	lch(43.33, 57.15, 30.03°)
OKLab	oklab(53.05% 0.1447 0.0668)
OKLCH	oklch(53.05% 0.159 24.8)
XYZ	xyz(21.6214, 13.3816, 5.4466)
Luminance	0.1338 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63B3A #3AB5B6

analogous

#B63A77 #B63B3A #B6793A

triadic

#B63B3A #3AB63B #3B3AB6

tetradic

#B63B3A #77B63A #3AB5B6 #793AB6

square

#B63B3A #77B63A #3AB5B6 #793AB6

split-complementary

#B63B3A #3AB679 #3A77B6

monochromatic

#591D1C #882C2B #B63B3A #CD6261 #DB908F

Accessibility & contrast

On white

5.71

#B63B3A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#B63B3A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63B3A

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63B3A	#FFFFFF	#000000	##FFFFFF
##B63B3A	1.00	5.71	3.68	5.71
#FFFFFF	5.71	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D5639

Deuteranopia (green-blind)

#7C7036

Tritanopia (blue-blind)

#C81A3C

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b63b3a;
/* rgb */ color: rgb(182, 59, 58);
/* oklch */ color: oklch(53.1% 0.159 24.8);

Tailwind

colors: {
  custom: {
    50: '#d37870',
    500: '#b63b3a',
    950: '#000000',
  },
}

SCSS

$custom: #b63b3a;
$custom-light: #d37870;
$custom-dark: #000000;

JSON

{
  "hex": "#b63b3a",
  "rgb": {
    "r": 182,
    "g": 59,
    "b": 58
  },
  "hsl": {
    "h": 0.484,
    "s": 51.667,
    "l": 47.059
  },
  "oklch": {
    "l": 0.53054,
    "c": 0.15931,
    "h": 24.8
  },
  "luminance": 0.13379
}

Semantic roles & 50–950 ramp

primary

#B63B3A

secondary

#86C6C6

accent

#DADB4D

background

#FEF7F6

surface

#FCEEEC

border

#D5C9C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #B63B3A

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

Preview Lab → · Contrast checker → · Palette generator →