#B5312C#B5312C

#B5312C is a mid, vivid red. Relative luminance 0.122; OKLCH L 51.6% C 0.170 H 27.1°. Best body text is #FFFFFF at 6.10:1 contrast (WCAG AA passes).

Color values

HEX	#B5312C
RGB	rgb(181, 49, 44)
HSL	hsl(2, 61%, 44%)
HSV	hsv(2, 76%, 71%)
CMYK	cmyk(0%, 72.9%, 75.7%, 29%)
CIE-LAB	lab(41.54, 52.37, 34.70)
CIE-LCH	lch(41.54, 62.83, 33.53°)
OKLab	oklab(51.62% 0.151 0.0774)
OKLCH	oklch(51.62% 0.17 27.1)
XYZ	xyz(20.6114, 12.2054, 3.6530)
Luminance	0.1220 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B5312C #2CB0B5

analogous

#B52C6C #B5312C #B5762C

triadic

#B5312C #2CB531 #312CB5

tetradic

#B5312C #6CB52C #2CB0B5 #762CB5

square

#B5312C #6CB52C #2CB0B5 #762CB5

split-complementary

#B5312C #2CB576 #2C6CB5

monochromatic

#531614 #842420 #B5312C #D3504B #DF807C

Accessibility & contrast

On white

6.10

#B5312C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.44

#B5312C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B5312C

6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B5312C	#FFFFFF	#000000	##FFFFFF
##B5312C	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)

#58502A

Deuteranopia (green-blind)

#796C27

Tritanopia (blue-blind)

#C70031

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b5312c;
/* rgb */ color: rgb(181, 49, 44);
/* oklch */ color: oklch(51.6% 0.170 27.1);

Tailwind

colors: {
  custom: {
    50: '#d47366',
    500: '#b5312c',
    950: '#000000',
  },
}

SCSS

$custom: #b5312c;
$custom-light: #d47366;
$custom-dark: #000000;

JSON

{
  "hex": "#b5312c",
  "rgb": {
    "r": 181,
    "g": 49,
    "b": 44
  },
  "hsl": {
    "h": 2.19,
    "s": 60.889,
    "l": 44.118
  },
  "oklch": {
    "l": 0.5162,
    "c": 0.16964,
    "h": 27.1
  },
  "luminance": 0.12202
}

Semantic roles & 50–950 ramp

primary

#B5312C

secondary

#75C5C8

accent

#DEE444

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B5312C

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

Preview Lab → · Contrast checker → · Palette generator →