#B5313C#B5313C

#B5313C is a mid, vivid red. Relative luminance 0.123; OKLCH L 51.9% C 0.168 H 20.9°. Best body text is #FFFFFF at 6.05:1 contrast (WCAG AA passes).

Color values

HEX	#B5313C
RGB	rgb(181, 49, 60)
HSL	hsl(355, 57%, 45%)
HSV	hsv(355, 73%, 71%)
CMYK	cmyk(0%, 72.9%, 66.9%, 29%)
CIE-LAB	lab(41.77, 53.14, 25.43)
CIE-LCH	lch(41.77, 58.91, 25.57°)
OKLab	oklab(51.86% 0.1568 0.06)
OKLCH	oklch(51.86% 0.168 20.9)
XYZ	xyz(20.9722, 12.3497, 5.5535)
Luminance	0.1235 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B5313C #31B5AA

analogous

#B5317E #B5313C #B56831

triadic

#B5313C #3CB531 #313CB5

tetradic

#B5313C #7EB531 #31B5AA #6831B5

square

#B5313C #7EB531 #31B5AA #6831B5

split-complementary

#B5313C #31B568 #317EB5

monochromatic

#55171C #85242C #B5313C #D0535D #DD838B

Accessibility & contrast

On white

6.05

#B5313C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.47

#B5313C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B5313C

6.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B5313C	#FFFFFF	#000000	##FFFFFF
##B5313C	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)

#56513B

Deuteranopia (green-blind)

#776D38

Tritanopia (blue-blind)

#C70036

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b5313c;
/* rgb */ color: rgb(181, 49, 60);
/* oklch */ color: oklch(51.9% 0.168 20.9);

Tailwind

colors: {
  custom: {
    50: '#d37371',
    500: '#b5313c',
    950: '#000000',
  },
}

SCSS

$custom: #b5313c;
$custom-light: #d37371;
$custom-dark: #000000;

JSON

{
  "hex": "#b5313c",
  "rgb": {
    "r": 181,
    "g": 49,
    "b": 60
  },
  "hsl": {
    "h": 355,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.51861,
    "c": 0.1679,
    "h": 20.9
  },
  "luminance": 0.12347
}

Semantic roles & 50–950 ramp

primary

#B5313C

secondary

#7BC7C0

accent

#E1D447

background

#FEF7F6

surface

#FCEDEC

border

#D5C8C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #B5313C

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

Preview Lab → · Contrast checker → · Palette generator →