#B73F28#B73F28

#B73F28 is a mid, vivid red. Relative luminance 0.138; OKLCH L 53.5% C 0.160 H 32.9°. Best body text is #FFFFFF at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#B73F28
RGB	rgb(183, 63, 40)
HSL	hsl(10, 64%, 44%)
HSV	hsv(10, 78%, 72%)
CMYK	cmyk(0%, 65.6%, 78.1%, 28.2%)
CIE-LAB	lab(43.91, 47.30, 39.56)
CIE-LCH	lch(43.91, 61.67, 39.91°)
OKLab	oklab(53.45% 0.1341 0.0867)
OKLCH	oklch(53.45% 0.16 32.9)
XYZ	xyz(21.6914, 13.7787, 3.5244)
Luminance	0.1378 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73F28 #28A0B7

analogous

#B72858 #B73F28 #B78628

triadic

#B73F28 #28B73F #3F28B7

tetradic

#B73F28 #58B728 #28A0B7 #8628B7

square

#B73F28 #58B728 #28A0B7 #8628B7

split-complementary

#B73F28 #28B786 #2858B7

monochromatic

#531C12 #852E1D #B73F28 #D65D46 #E18978

Accessibility & contrast

On white

5.59

#B73F28 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#B73F28 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73F28

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73F28	#FFFFFF	#000000	##FFFFFF
##B73F28	1.00	5.59	3.76	5.59
#FFFFFF	5.59	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#615725

Deuteranopia (green-blind)

#7F7223

Tritanopia (blue-blind)

#C91D3B

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #b73f28;
/* rgb */ color: rgb(183, 63, 40);
/* oklch */ color: oklch(53.5% 0.160 32.9);

Tailwind

colors: {
  custom: {
    50: '#d57a63',
    500: '#b73f28',
    950: '#000000',
  },
}

SCSS

$custom: #b73f28;
$custom-light: #d57a63;
$custom-dark: #000000;

JSON

{
  "hex": "#b73f28",
  "rgb": {
    "r": 183,
    "g": 63,
    "b": 40
  },
  "hsl": {
    "h": 9.65,
    "s": 64.126,
    "l": 43.725
  },
  "oklch": {
    "l": 0.53452,
    "c": 0.15966,
    "h": 32.9
  },
  "luminance": 0.13775
}

Semantic roles & 50–950 ramp

primary

#B73F28

secondary

#72BBC9

accent

#CCE741

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160A05

muted

#847C7A

Preview Lab

Preview with #B73F28

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

Preview Lab → · Contrast checker → · Palette generator →