#B73728#B73728

#B73728 is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.5% C 0.167 H 30.2°. Best body text is #FFFFFF at 5.85:1 contrast (WCAG AA passes).

Color values

HEX	#B73728
RGB	rgb(183, 55, 40)
HSL	hsl(6, 64%, 44%)
HSV	hsv(6, 78%, 72%)
CMYK	cmyk(0%, 69.9%, 78.1%, 28.2%)
CIE-LAB	lab(42.70, 50.60, 38.30)
CIE-LCH	lch(42.70, 63.46, 37.12°)
OKLab	oklab(52.54% 0.1443 0.084)
OKLCH	oklch(52.54% 0.167 30.2)
XYZ	xyz(21.2801, 12.9561, 3.3873)
Luminance	0.1295 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73728 #28A8B7

analogous

#B72860 #B73728 #B77E28

triadic

#B73728 #28B737 #3728B7

tetradic

#B73728 #60B728 #28A8B7 #7E28B7

square

#B73728 #60B728 #28A8B7 #7E28B7

split-complementary

#B73728 #28B77E #2860B7

monochromatic

#531912 #85281D #B73728 #D65546 #E18378

Accessibility & contrast

On white

5.85

#B73728 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.59

#B73728 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73728

5.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73728	#FFFFFF	#000000	##FFFFFF
##B73728	1.00	5.85	3.59	5.85
#FFFFFF	5.85	1.00	21.00	1.00
#000000	3.59	21.00	1.00	21.00
##FFFFFF	5.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5325

Deuteranopia (green-blind)

#7C6F23

Tritanopia (blue-blind)

#CA0535

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b73728;
/* rgb */ color: rgb(183, 55, 40);
/* oklch */ color: oklch(52.5% 0.167 30.2);

Tailwind

colors: {
  custom: {
    50: '#d57663',
    500: '#b73728',
    950: '#000000',
  },
}

SCSS

$custom: #b73728;
$custom-light: #d57663;
$custom-dark: #000000;

JSON

{
  "hex": "#b73728",
  "rgb": {
    "r": 183,
    "g": 55,
    "b": 40
  },
  "hsl": {
    "h": 6.294,
    "s": 64.126,
    "l": 43.725
  },
  "oklch": {
    "l": 0.52539,
    "c": 0.16699,
    "h": 30.2
  },
  "luminance": 0.12953
}

Semantic roles & 50–950 ramp

primary

#B73728

secondary

#72C0C9

accent

#D6E741

background

#FEF7F5

surface

#FCEDEA

border

#D5C8C6

text

#160905

muted

#847B79

Preview Lab

Preview with #B73728

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

Preview Lab → · Contrast checker → · Palette generator →