#B7312A#B7312A

#B7312A is a mid, vivid red. Relative luminance 0.124; OKLCH L 51.9% C 0.172 H 27.8°. Best body text is #FFFFFF at 6.02:1 contrast (WCAG AA passes).

Color values

HEX	#B7312A
RGB	rgb(183, 49, 42)
HSL	hsl(3, 63%, 44%)
HSV	hsv(3, 77%, 72%)
CMYK	cmyk(0%, 73.2%, 77%, 28.2%)
CIE-LAB	lab(41.90, 52.94, 36.34)
CIE-LCH	lch(41.90, 64.21, 34.47°)
OKLab	oklab(51.95% 0.1521 0.0803)
OKLCH	oklch(51.95% 0.172 27.8)
XYZ	xyz(21.0471, 12.4343, 3.4819)
Luminance	0.1243 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B7312A #2AB0B7

analogous

#B72A6A #B7312A #B7782A

triadic

#B7312A #2AB731 #312AB7

tetradic

#B7312A #6AB72A #2AB0B7 #782AB7

square

#B7312A #6AB72A #2AB0B7 #782AB7

split-complementary

#B7312A #2AB778 #2A6AB7

monochromatic

#531613 #85241F #B7312A #D55049 #E1807B

Accessibility & contrast

On white

6.02

#B7312A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#B7312A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B7312A

6.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B7312A	#FFFFFF	#000000	##FFFFFF
##B7312A	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)

#595028

Deuteranopia (green-blind)

#7A6D25

Tritanopia (blue-blind)

#CA0031

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b7312a;
/* rgb */ color: rgb(183, 49, 42);
/* oklch */ color: oklch(51.9% 0.172 27.8);

Tailwind

colors: {
  custom: {
    50: '#d57364',
    500: '#b7312a',
    950: '#000000',
  },
}

SCSS

$custom: #b7312a;
$custom-light: #d57364;
$custom-dark: #000000;

JSON

{
  "hex": "#b7312a",
  "rgb": {
    "r": 183,
    "g": 49,
    "b": 42
  },
  "hsl": {
    "h": 2.979,
    "s": 62.667,
    "l": 44.118
  },
  "oklch": {
    "l": 0.51949,
    "c": 0.17196,
    "h": 27.8
  },
  "luminance": 0.12431
}

Semantic roles & 50–950 ramp

primary

#B7312A

secondary

#74C5C9

accent

#DEE642

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160905

muted

#847B7A

Preview Lab

Preview with #B7312A

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

Preview Lab → · Contrast checker → · Palette generator →