#B73A3A#B73A3A

#B73A3A is a mid, vivid red. Relative luminance 0.134; OKLCH L 53.1% C 0.161 H 24.5°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#B73A3A
RGB	rgb(183, 58, 58)
HSL	hsl(0, 52%, 47%)
HSV	hsv(0, 68%, 72%)
CMYK	cmyk(0%, 68.3%, 68.3%, 28.2%)
CIE-LAB	lab(43.36, 50.22, 28.68)
CIE-LCH	lch(43.36, 57.84, 29.73°)
OKLab	oklab(53.11% 0.1469 0.0669)
OKLCH	oklch(53.11% 0.161 24.5)
XYZ	xyz(21.8075, 13.4020, 5.4407)
Luminance	0.1340 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73A3A #3AB7B7

analogous

#B73A79 #B73A3A #B7793A

triadic

#B73A3A #3AB73A #3A3AB7

tetradic

#B73A3A #79B73A #3AB7B7 #793AB7

square

#B73A3A #79B73A #3AB7B7 #793AB7

split-complementary

#B73A3A #3AB779 #3A79B7

monochromatic

#5A1D1D #892B2B #B73A3A #CD6161 #DC9090

Accessibility & contrast

On white

5.71

#B73A3A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#B73A3A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73A3A

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73A3A	#FFFFFF	#000000	##FFFFFF
##B73A3A	1.00	5.71	3.68	5.71
#FFFFFF	5.71	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5539

Deuteranopia (green-blind)

#7C7036

Tritanopia (blue-blind)

#C9173B

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b73a3a;
/* rgb */ color: rgb(183, 58, 58);
/* oklch */ color: oklch(53.1% 0.161 24.5);

Tailwind

colors: {
  custom: {
    50: '#d47870',
    500: '#b73a3a',
    950: '#000000',
  },
}

SCSS

$custom: #b73a3a;
$custom-light: #d47870;
$custom-dark: #000000;

JSON

{
  "hex": "#b73a3a",
  "rgb": {
    "r": 183,
    "g": 58,
    "b": 58
  },
  "hsl": {
    "h": 0,
    "s": 51.867,
    "l": 47.255
  },
  "oklch": {
    "l": 0.5311,
    "c": 0.16138,
    "h": 24.5
  },
  "luminance": 0.13399
}

Semantic roles & 50–950 ramp

primary

#B73A3A

secondary

#86C7C7

accent

#DBDB4C

background

#FEF7F6

surface

#FCEEEC

border

#D5C9C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #B73A3A

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

Preview Lab → · Contrast checker → · Palette generator →