#B53131#B53131

#B53131 is a mid, vivid red. Relative luminance 0.122; OKLCH L 51.7% C 0.169 H 25.4°. Best body text is #FFFFFF at 6.09:1 contrast (WCAG AA passes).

Color values

HEX	#B53131
RGB	rgb(181, 49, 49)
HSL	hsl(0, 57%, 45%)
HSV	hsv(0, 73%, 71%)
CMYK	cmyk(0%, 72.9%, 72.9%, 29%)
CIE-LAB	lab(41.60, 52.59, 31.86)
CIE-LCH	lch(41.60, 61.49, 31.21°)
OKLab	oklab(51.69% 0.1527 0.0724)
OKLCH	oklch(51.69% 0.169 25.4)
XYZ	xyz(20.7111, 12.2453, 4.1782)
Luminance	0.1224 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B53131 #31B5B5

analogous

#B53173 #B53131 #B57331

triadic

#B53131 #31B531 #3131B5

tetradic

#B53131 #73B531 #31B5B5 #7331B5

square

#B53131 #73B531 #31B5B5 #7331B5

split-complementary

#B53131 #31B573 #3173B5

monochromatic

#551717 #852424 #B53131 #D05353 #DD8383

Accessibility & contrast

On white

6.09

#B53131 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.45

#B53131 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B53131

6.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B53131	#FFFFFF	#000000	##FFFFFF
##B53131	1.00	6.09	3.45	6.09
#FFFFFF	6.09	1.00	21.00	1.00
#000000	3.45	21.00	1.00	21.00
##FFFFFF	6.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#575030

Deuteranopia (green-blind)

#786D2C

Tritanopia (blue-blind)

#C70033

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b53131;
/* rgb */ color: rgb(181, 49, 49);
/* oklch */ color: oklch(51.7% 0.169 25.4);

Tailwind

colors: {
  custom: {
    50: '#d37369',
    500: '#b53131',
    950: '#000000',
  },
}

SCSS

$custom: #b53131;
$custom-light: #d37369;
$custom-dark: #000000;

JSON

{
  "hex": "#b53131",
  "rgb": {
    "r": 181,
    "g": 49,
    "b": 49
  },
  "hsl": {
    "h": 0,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.51687,
    "c": 0.16897,
    "h": 25.4
  },
  "luminance": 0.12242
}

Semantic roles & 50–950 ramp

primary

#B53131

secondary

#7BC7C7

accent

#E1E147

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B53131

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

Preview Lab → · Contrast checker → · Palette generator →