#B63831#B63831

#B63831 is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.6% C 0.164 H 27.4°. Best body text is #FFFFFF at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#B63831
RGB	rgb(182, 56, 49)
HSL	hsl(3, 58%, 45%)
HSV	hsv(3, 73%, 71%)
CMYK	cmyk(0%, 69.2%, 73.1%, 28.6%)
CIE-LAB	lab(42.76, 50.25, 33.23)
CIE-LCH	lch(42.76, 60.24, 33.48°)
OKLab	oklab(52.59% 0.1452 0.0753)
OKLCH	oklch(52.59% 0.164 27.4)
XYZ	xyz(21.2623, 12.9983, 4.2945)
Luminance	0.1300 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63831 #31AFB6

analogous

#B6316C #B63831 #B67A31

triadic

#B63831 #31B638 #3831B6

tetradic

#B63831 #6CB631 #31AFB6 #7A31B6

square

#B63831 #6CB631 #31AFB6 #7A31B6

split-complementary

#B63831 #31B67A #316CB6

monochromatic

#561A17 #862924 #B63831 #D15A53 #DE8884

Accessibility & contrast

On white

5.83

#B63831 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#B63831 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63831

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63831	#FFFFFF	#000000	##FFFFFF
##B63831	1.00	5.83	3.60	5.83
#FFFFFF	5.83	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C542F

Deuteranopia (green-blind)

#7B6F2D

Tritanopia (blue-blind)

#C80F38

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b63831;
/* rgb */ color: rgb(182, 56, 49);
/* oklch */ color: oklch(52.6% 0.164 27.4);

Tailwind

colors: {
  custom: {
    50: '#d47669',
    500: '#b63831',
    950: '#000000',
  },
}

SCSS

$custom: #b63831;
$custom-light: #d47669;
$custom-dark: #000000;

JSON

{
  "hex": "#b63831",
  "rgb": {
    "r": 182,
    "g": 56,
    "b": 49
  },
  "hsl": {
    "h": 3.158,
    "s": 57.576,
    "l": 45.294
  },
  "oklch": {
    "l": 0.52586,
    "c": 0.16355,
    "h": 27.4
  },
  "luminance": 0.12995
}

Semantic roles & 50–950 ramp

primary

#B63831

secondary

#7CC3C7

accent

#D9E147

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B63831

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

Preview Lab → · Contrast checker → · Palette generator →