#B7312C#B7312C

#B7312C is a mid, vivid red. Relative luminance 0.124; OKLCH L 52.0% C 0.172 H 27.2°. Best body text is #FFFFFF at 6.02:1 contrast (WCAG AA passes).

Color values

HEX	#B7312C
RGB	rgb(183, 49, 44)
HSL	hsl(2, 61%, 45%)
HSV	hsv(2, 76%, 72%)
CMYK	cmyk(0%, 73.2%, 76%, 28.2%)
CIE-LAB	lab(41.92, 53.01, 35.23)
CIE-LCH	lch(41.92, 63.65, 33.61°)
OKLab	oklab(51.97% 0.1527 0.0784)
OKLCH	oklch(51.97% 0.172 27.2)
XYZ	xyz(21.0838, 12.4490, 3.6751)
Luminance	0.1245 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B7312C #2CB2B7

analogous

#B72C6D #B7312C #B7762C

triadic

#B7312C #2CB731 #312CB7

tetradic

#B7312C #6DB72C #2CB2B7 #762CB7

square

#B7312C #6DB72C #2CB2B7 #762CB7

split-complementary

#B7312C #2CB776 #2C6DB7

monochromatic

#541714 #862420 #B7312C #D4514C #E0817E

Accessibility & contrast

On white

6.02

#B7312C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#B7312C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B7312C

6.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B7312C	#FFFFFF	#000000	##FFFFFF
##B7312C	1.00	6.02	3.49	6.02
#FFFFFF	6.02	1.00	21.00	1.00
#000000	3.49	21.00	1.00	21.00
##FFFFFF	6.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#59502A

Deuteranopia (green-blind)

#7A6E27

Tritanopia (blue-blind)

#CA0031

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b7312c;
/* rgb */ color: rgb(183, 49, 44);
/* oklch */ color: oklch(52.0% 0.172 27.2);

Tailwind

colors: {
  custom: {
    50: '#d57366',
    500: '#b7312c',
    950: '#000000',
  },
}

SCSS

$custom: #b7312c;
$custom-light: #d57366;
$custom-dark: #000000;

JSON

{
  "hex": "#b7312c",
  "rgb": {
    "r": 183,
    "g": 49,
    "b": 44
  },
  "hsl": {
    "h": 2.158,
    "s": 61.233,
    "l": 44.51
  },
  "oklch": {
    "l": 0.51973,
    "c": 0.17167,
    "h": 27.2
  },
  "luminance": 0.12446
}

Semantic roles & 50–950 ramp

primary

#B7312C

secondary

#76C5C8

accent

#DFE443

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B7312C

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

Preview Lab → · Contrast checker → · Palette generator →