#B5313F#B5313F

#B5313F is a mid, vivid red. Relative luminance 0.124; OKLCH L 51.9% C 0.168 H 19.6°. Best body text is #FFFFFF at 6.04:1 contrast (WCAG AA passes).

Color values

HEX	#B5313F
RGB	rgb(181, 49, 63)
HSL	hsl(354, 57%, 45%)
HSV	hsv(354, 73%, 71%)
CMYK	cmyk(0%, 72.9%, 65.2%, 29%)
CIE-LAB	lab(41.82, 53.32, 23.65)
CIE-LCH	lch(41.82, 58.33, 23.92°)
OKLab	oklab(51.92% 0.158 0.0563)
OKLCH	oklch(51.92% 0.168 19.6)
XYZ	xyz(21.0538, 12.3824, 5.9831)
Luminance	0.1238 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B5313F #31B5A7

analogous

#B53181 #B5313F #B56531

triadic

#B5313F #3FB531 #313FB5

tetradic

#B5313F #81B531 #31B5A7 #6531B5

square

#B5313F #81B531 #31B5A7 #6531B5

split-complementary

#B5313F #31B565 #3181B5

monochromatic

#55171D #85242E #B5313F #D05360 #DD838D

Accessibility & contrast

On white

6.04

#B5313F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#B5313F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B5313F

6.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B5313F	#FFFFFF	#000000	##FFFFFF
##B5313F	1.00	6.04	3.48	6.04
#FFFFFF	6.04	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#56513F

Deuteranopia (green-blind)

#776D3B

Tritanopia (blue-blind)

#C70037

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b5313f;
/* rgb */ color: rgb(181, 49, 63);
/* oklch */ color: oklch(51.9% 0.168 19.6);

Tailwind

colors: {
  custom: {
    50: '#d37374',
    500: '#b5313f',
    950: '#000000',
  },
}

SCSS

$custom: #b5313f;
$custom-light: #d37374;
$custom-dark: #000000;

JSON

{
  "hex": "#b5313f",
  "rgb": {
    "r": 181,
    "g": 49,
    "b": 63
  },
  "hsl": {
    "h": 353.636,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.51915,
    "c": 0.16773,
    "h": 19.6
  },
  "luminance": 0.12379
}

Semantic roles & 50–950 ramp

primary

#B5313F

secondary

#7BC7BF

accent

#E1D047

background

#FDF7F7

surface

#FBEDED

border

#D4C8C8

text

#150908

muted

#837B7B

Preview Lab

Preview with #B5313F

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

Preview Lab → · Contrast checker → · Palette generator →