#B63131#B63131

#B63131 is a mid, vivid red. Relative luminance 0.124; OKLCH L 51.9% C 0.170 H 25.4°. Best body text is #FFFFFF at 6.05:1 contrast (WCAG AA passes).

Color values

HEX	#B63131
RGB	rgb(182, 49, 49)
HSL	hsl(0, 58%, 45%)
HSV	hsv(0, 73%, 71%)
CMYK	cmyk(0%, 73.1%, 73.1%, 28.6%)
CIE-LAB	lab(41.79, 52.91, 32.12)
CIE-LCH	lch(41.79, 61.90, 31.27°)
OKLab	oklab(51.86% 0.1536 0.0729)
OKLCH	oklch(51.86% 0.17 25.4)
XYZ	xyz(20.9465, 12.3666, 4.1892)
Luminance	0.1236 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63131 #31B6B6

analogous

#B63173 #B63131 #B67331

triadic

#B63131 #31B631 #3131B6

tetradic

#B63131 #73B631 #31B6B6 #7331B6

square

#B63131 #73B631 #31B6B6 #7331B6

split-complementary

#B63131 #31B673 #3173B6

monochromatic

#561717 #862424 #B63131 #D15353 #DE8484

Accessibility & contrast

On white

6.05

#B63131 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.47

#B63131 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63131

6.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63131	#FFFFFF	#000000	##FFFFFF
##B63131	1.00	6.05	3.47	6.05
#FFFFFF	6.05	1.00	21.00	1.00
#000000	3.47	21.00	1.00	21.00
##FFFFFF	6.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#585030

Deuteranopia (green-blind)

#796D2C

Tritanopia (blue-blind)

#C80033

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b63131;
/* rgb */ color: rgb(182, 49, 49);
/* oklch */ color: oklch(51.9% 0.170 25.4);

Tailwind

colors: {
  custom: {
    50: '#d47369',
    500: '#b63131',
    950: '#000000',
  },
}

SCSS

$custom: #b63131;
$custom-light: #d47369;
$custom-dark: #000000;

JSON

{
  "hex": "#b63131",
  "rgb": {
    "r": 182,
    "g": 49,
    "b": 49
  },
  "hsl": {
    "h": 0,
    "s": 57.576,
    "l": 45.294
  },
  "oklch": {
    "l": 0.51863,
    "c": 0.17,
    "h": 25.4
  },
  "luminance": 0.12363
}

Semantic roles & 50–950 ramp

primary

#B63131

secondary

#7CC7C7

accent

#E1E147

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B63131

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

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