#B5313D#B5313D

#B5313D is a mid, vivid red. Relative luminance 0.124; OKLCH L 51.9% C 0.168 H 20.5°. Best body text is #FFFFFF at 6.05:1 contrast (WCAG AA passes).

Color values

HEX	#B5313D
RGB	rgb(181, 49, 61)
HSL	hsl(355, 57%, 45%)
HSV	hsv(355, 73%, 71%)
CMYK	cmyk(0%, 72.9%, 66.3%, 29%)
CIE-LAB	lab(41.78, 53.20, 24.83)
CIE-LCH	lch(41.78, 58.71, 25.02°)
OKLab	oklab(51.88% 0.1572 0.0588)
OKLCH	oklch(51.88% 0.168 20.5)
XYZ	xyz(20.9989, 12.3604, 5.6941)
Luminance	0.1236 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B5313D #31B5A9

analogous

#B5317F #B5313D #B56731

triadic

#B5313D #3DB531 #313DB5

tetradic

#B5313D #7FB531 #31B5A9 #6731B5

square

#B5313D #7FB531 #31B5A9 #6731B5

split-complementary

#B5313D #31B567 #317FB5

monochromatic

#55171D #85242D #B5313D #D0535E #DD838B

Accessibility & contrast

On white

6.05

#B5313D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.47

#B5313D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B5313D

6.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B5313D	#FFFFFF	#000000	##FFFFFF
##B5313D	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)

#56513C

Deuteranopia (green-blind)

#776D39

Tritanopia (blue-blind)

#C70037

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b5313d;
/* rgb */ color: rgb(181, 49, 61);
/* oklch */ color: oklch(51.9% 0.168 20.5);

Tailwind

colors: {
  custom: {
    50: '#d37372',
    500: '#b5313d',
    950: '#000000',
  },
}

SCSS

$custom: #b5313d;
$custom-light: #d37372;
$custom-dark: #000000;

JSON

{
  "hex": "#b5313d",
  "rgb": {
    "r": 181,
    "g": 49,
    "b": 61
  },
  "hsl": {
    "h": 354.545,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.51879,
    "c": 0.16784,
    "h": 20.5
  },
  "luminance": 0.12357
}

Semantic roles & 50–950 ramp

primary

#B5313D

secondary

#7BC7C0

accent

#E1D347

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150908

muted

#837B7B

Preview Lab

Preview with #B5313D

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

Preview Lab → · Contrast checker → · Palette generator →