#B73A2A#B73A2A

#B73A2A is a mid, vivid red. Relative luminance 0.133; OKLCH L 52.9% C 0.164 H 30.5°. Best body text is #FFFFFF at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#B73A2A
RGB	rgb(183, 58, 42)
HSL	hsl(7, 63%, 44%)
HSV	hsv(7, 77%, 72%)
CMYK	cmyk(0%, 68.3%, 77%, 28.2%)
CIE-LAB	lab(43.16, 49.48, 37.69)
CIE-LCH	lch(43.16, 62.20, 37.29°)
OKLab	oklab(52.89% 0.1412 0.0832)
OKLCH	oklch(52.89% 0.164 30.5)
XYZ	xyz(21.4618, 13.2638, 3.6201)
Luminance	0.1326 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73A2A #2AA7B7

analogous

#B72A60 #B73A2A #B7812A

triadic

#B73A2A #2AB73A #3A2AB7

tetradic

#B73A2A #60B72A #2AA7B7 #812AB7

square

#B73A2A #60B72A #2AA7B7 #812AB7

split-complementary

#B73A2A #2AB781 #2A60B7

monochromatic

#531A13 #852A1F #B73A2A #D55949 #E1867B

Accessibility & contrast

On white

5.75

#B73A2A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#B73A2A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73A2A

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73A2A	#FFFFFF	#000000	##FFFFFF
##B73A2A	1.00	5.75	3.65	5.75
#FFFFFF	5.75	1.00	21.00	1.00
#000000	3.65	21.00	1.00	21.00
##FFFFFF	5.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E5527

Deuteranopia (green-blind)

#7D7025

Tritanopia (blue-blind)

#C91137

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b73a2a;
/* rgb */ color: rgb(183, 58, 42);
/* oklch */ color: oklch(52.9% 0.164 30.5);

Tailwind

colors: {
  custom: {
    50: '#d57765',
    500: '#b73a2a',
    950: '#000000',
  },
}

SCSS

$custom: #b73a2a;
$custom-light: #d57765;
$custom-dark: #000000;

JSON

{
  "hex": "#b73a2a",
  "rgb": {
    "r": 183,
    "g": 58,
    "b": 42
  },
  "hsl": {
    "h": 6.809,
    "s": 62.667,
    "l": 44.118
  },
  "oklch": {
    "l": 0.52891,
    "c": 0.16392,
    "h": 30.5
  },
  "luminance": 0.13261
}

Semantic roles & 50–950 ramp

primary

#B73A2A

secondary

#74BFC9

accent

#D3E642

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160905

muted

#847B7A

Preview Lab

Preview with #B73A2A

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

Preview Lab → · Contrast checker → · Palette generator →