#B73A2B#B73A2B

#B73A2B is a mid, vivid red. Relative luminance 0.133; OKLCH L 52.9% C 0.164 H 30.2°. Best body text is #FFFFFF at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#B73A2B
RGB	rgb(183, 58, 43)
HSL	hsl(6, 62%, 44%)
HSV	hsv(6, 77%, 72%)
CMYK	cmyk(0%, 68.3%, 76.5%, 28.2%)
CIE-LAB	lab(43.17, 49.52, 37.14)
CIE-LCH	lch(43.17, 61.90, 36.87°)
OKLab	oklab(52.9% 0.1416 0.0823)
OKLCH	oklch(52.9% 0.164 30.2)
XYZ	xyz(21.4800, 13.2710, 3.7155)
Luminance	0.1327 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73A2B #2BA8B7

analogous

#B72B62 #B73A2B #B7802B

triadic

#B73A2B #2BB73A #3A2BB7

tetradic

#B73A2B #62B72B #2BA8B7 #802BB7

square

#B73A2B #62B72B #2BA8B7 #802BB7

split-complementary

#B73A2B #2BB780 #2B62B7

monochromatic

#541B14 #852A1F #B73A2B #D5594B #E0877C

Accessibility & contrast

On white

5.75

#B73A2B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#B73A2B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73A2B

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73A2B	#FFFFFF	#000000	##FFFFFF
##B73A2B	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)

#5E5528

Deuteranopia (green-blind)

#7D7026

Tritanopia (blue-blind)

#C91137

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b73a2b;
/* rgb */ color: rgb(183, 58, 43);
/* oklch */ color: oklch(52.9% 0.164 30.2);

Tailwind

colors: {
  custom: {
    50: '#d57765',
    500: '#b73a2b',
    950: '#000000',
  },
}

SCSS

$custom: #b73a2b;
$custom-light: #d57765;
$custom-dark: #000000;

JSON

{
  "hex": "#b73a2b",
  "rgb": {
    "r": 183,
    "g": 58,
    "b": 43
  },
  "hsl": {
    "h": 6.429,
    "s": 61.947,
    "l": 44.314
  },
  "oklch": {
    "l": 0.52903,
    "c": 0.16374,
    "h": 30.2
  },
  "luminance": 0.13268
}

Semantic roles & 50–950 ramp

primary

#B73A2B

secondary

#75C0C9

accent

#D4E543

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B73A2B

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

Preview Lab → · Contrast checker → · Palette generator →