#B5312D#B5312D

#B5312D is a mid, vivid red. Relative luminance 0.122; OKLCH L 51.6% C 0.170 H 26.8°. Best body text is #FFFFFF at 6.10:1 contrast (WCAG AA passes).

Color values

HEX	#B5312D
RGB	rgb(181, 49, 45)
HSL	hsl(2, 60%, 44%)
HSV	hsv(2, 75%, 71%)
CMYK	cmyk(0%, 72.9%, 75.1%, 29%)
CIE-LAB	lab(41.55, 52.42, 34.14)
CIE-LCH	lch(41.55, 62.55, 33.08°)
OKLab	oklab(51.63% 0.1513 0.0764)
OKLCH	oklch(51.63% 0.17 26.8)
XYZ	xyz(20.6304, 12.2130, 3.7532)
Luminance	0.1221 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B5312D #2DB1B5

analogous

#B52D6D #B5312D #B5752D

triadic

#B5312D #2DB531 #312DB5

tetradic

#B5312D #6DB52D #2DB1B5 #752DB5

square

#B5312D #6DB52D #2DB1B5 #752DB5

split-complementary

#B5312D #2DB575 #2D6DB5

monochromatic

#531615 #842421 #B5312D #D3514D #DF807E

Accessibility & contrast

On white

6.10

#B5312D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.44

#B5312D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B5312D

6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B5312D	#FFFFFF	#000000	##FFFFFF
##B5312D	1.00	6.10	3.44	6.10
#FFFFFF	6.10	1.00	21.00	1.00
#000000	3.44	21.00	1.00	21.00
##FFFFFF	6.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#58502B

Deuteranopia (green-blind)

#796C28

Tritanopia (blue-blind)

#C70032

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b5312d;
/* rgb */ color: rgb(181, 49, 45);
/* oklch */ color: oklch(51.6% 0.170 26.8);

Tailwind

colors: {
  custom: {
    50: '#d47366',
    500: '#b5312d',
    950: '#000000',
  },
}

SCSS

$custom: #b5312d;
$custom-light: #d47366;
$custom-dark: #000000;

JSON

{
  "hex": "#b5312d",
  "rgb": {
    "r": 181,
    "g": 49,
    "b": 45
  },
  "hsl": {
    "h": 1.765,
    "s": 60.177,
    "l": 44.314
  },
  "oklch": {
    "l": 0.51633,
    "c": 0.1695,
    "h": 26.8
  },
  "luminance": 0.1221
}

Semantic roles & 50–950 ramp

primary

#B5312D

secondary

#76C5C7

accent

#DFE344

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B5312D

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

Preview Lab → · Contrast checker → · Palette generator →