#B7312B#B7312B

#B7312B is a mid, vivid red. Relative luminance 0.124; OKLCH L 52.0% C 0.172 H 27.5°. Best body text is #FFFFFF at 6.02:1 contrast (WCAG AA passes).

Color values

HEX	#B7312B
RGB	rgb(183, 49, 43)
HSL	hsl(3, 62%, 44%)
HSV	hsv(3, 77%, 72%)
CMYK	cmyk(0%, 73.2%, 76.5%, 28.2%)
CIE-LAB	lab(41.91, 52.97, 35.79)
CIE-LCH	lch(41.91, 63.93, 34.04°)
OKLab	oklab(51.96% 0.1524 0.0794)
OKLCH	oklch(51.96% 0.172 27.5)
XYZ	xyz(21.0652, 12.4416, 3.5773)
Luminance	0.1244 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B7312B #2BB1B7

analogous

#B72B6B #B7312B #B7772B

triadic

#B7312B #2BB731 #312BB7

tetradic

#B7312B #6BB72B #2BB1B7 #772BB7

square

#B7312B #6BB72B #2BB1B7 #772BB7

split-complementary

#B7312B #2BB777 #2B6BB7

monochromatic

#541614 #85241F #B7312B #D5514B #E0807C

Accessibility & contrast

On white

6.02

#B7312B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#B7312B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B7312B

6.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B7312B	#FFFFFF	#000000	##FFFFFF
##B7312B	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)

#595029

Deuteranopia (green-blind)

#7A6E26

Tritanopia (blue-blind)

#CA0031

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b7312b;
/* rgb */ color: rgb(183, 49, 43);
/* oklch */ color: oklch(52.0% 0.172 27.5);

Tailwind

colors: {
  custom: {
    50: '#d57365',
    500: '#b7312b',
    950: '#000000',
  },
}

SCSS

$custom: #b7312b;
$custom-light: #d57365;
$custom-dark: #000000;

JSON

{
  "hex": "#b7312b",
  "rgb": {
    "r": 183,
    "g": 49,
    "b": 43
  },
  "hsl": {
    "h": 2.571,
    "s": 61.947,
    "l": 44.314
  },
  "oklch": {
    "l": 0.51961,
    "c": 0.17182,
    "h": 27.5
  },
  "luminance": 0.12438
}

Semantic roles & 50–950 ramp

primary

#B7312B

secondary

#75C5C9

accent

#DEE543

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160905

muted

#847B7A

Preview Lab

Preview with #B7312B

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

Preview Lab → · Contrast checker → · Palette generator →