#B73131#B73131

#B73131 is a mid, vivid red. Relative luminance 0.125; OKLCH L 52.0% C 0.171 H 25.4°. Best body text is #FFFFFF at 6.00:1 contrast (WCAG AA passes).

Color values

HEX	#B73131
RGB	rgb(183, 49, 49)
HSL	hsl(0, 58%, 45%)
HSV	hsv(0, 73%, 72%)
CMYK	cmyk(0%, 73.2%, 73.2%, 28.2%)
CIE-LAB	lab(41.98, 53.22, 32.39)
CIE-LCH	lch(41.98, 62.31, 31.33°)
OKLab	oklab(52.04% 0.1545 0.0734)
OKLCH	oklch(52.04% 0.171 25.4)
XYZ	xyz(21.1835, 12.4889, 4.2003)
Luminance	0.1249 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73131 #31B7B7

analogous

#B73174 #B73131 #B77431

triadic

#B73131 #31B731 #3131B7

tetradic

#B73131 #74B731 #31B7B7 #7431B7

square

#B73131 #74B731 #31B7B7 #7431B7

split-complementary

#B73131 #31B774 #3174B7

monochromatic

#561717 #872424 #B73131 #D15454 #DE8484

Accessibility & contrast

On white

6.00

#B73131 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.50

#B73131 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73131

6.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73131	#FFFFFF	#000000	##FFFFFF
##B73131	1.00	6.00	3.50	6.00
#FFFFFF	6.00	1.00	21.00	1.00
#000000	3.50	21.00	1.00	21.00
##FFFFFF	6.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#585130

Deuteranopia (green-blind)

#7A6E2C

Tritanopia (blue-blind)

#C90033

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b73131;
/* rgb */ color: rgb(183, 49, 49);
/* oklch */ color: oklch(52.0% 0.171 25.4);

Tailwind

colors: {
  custom: {
    50: '#d57369',
    500: '#b73131',
    950: '#000000',
  },
}

SCSS

$custom: #b73131;
$custom-light: #d57369;
$custom-dark: #000000;

JSON

{
  "hex": "#b73131",
  "rgb": {
    "r": 183,
    "g": 49,
    "b": 49
  },
  "hsl": {
    "h": 0,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.52039,
    "c": 0.171,
    "h": 25.4
  },
  "luminance": 0.12486
}

Semantic roles & 50–950 ramp

primary

#B73131

secondary

#7CC8C8

accent

#E1E147

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B73131

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

Preview Lab → · Contrast checker → · Palette generator →