#B73828#B73828

#B73828 is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.6% C 0.166 H 30.5°. Best body text is #FFFFFF at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#B73828
RGB	rgb(183, 56, 40)
HSL	hsl(7, 64%, 44%)
HSV	hsv(7, 78%, 72%)
CMYK	cmyk(0%, 69.4%, 78.1%, 28.2%)
CIE-LAB	lab(42.84, 50.21, 38.45)
CIE-LCH	lch(42.84, 63.24, 37.44°)
OKLab	oklab(52.65% 0.1431 0.0843)
OKLCH	oklch(52.65% 0.166 30.5)
XYZ	xyz(21.3281, 13.0520, 3.4033)
Luminance	0.1305 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73828 #28A7B7

analogous

#B7285F #B73828 #B77F28

triadic

#B73828 #28B738 #3828B7

tetradic

#B73828 #5FB728 #28A7B7 #7F28B7

square

#B73828 #5FB728 #28A7B7 #7F28B7

split-complementary

#B73828 #28B77F #285FB7

monochromatic

#531912 #85291D #B73828 #D65646 #E18478

Accessibility & contrast

On white

5.82

#B73828 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.61

#B73828 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73828

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73828	#FFFFFF	#000000	##FFFFFF
##B73828	1.00	5.82	3.61	5.82
#FFFFFF	5.82	1.00	21.00	1.00
#000000	3.61	21.00	1.00	21.00
##FFFFFF	5.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D5325

Deuteranopia (green-blind)

#7C6F23

Tritanopia (blue-blind)

#CA0935

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b73828;
/* rgb */ color: rgb(183, 56, 40);
/* oklch */ color: oklch(52.6% 0.166 30.5);

Tailwind

colors: {
  custom: {
    50: '#d57663',
    500: '#b73828',
    950: '#000000',
  },
}

SCSS

$custom: #b73828;
$custom-light: #d57663;
$custom-dark: #000000;

JSON

{
  "hex": "#b73828",
  "rgb": {
    "r": 183,
    "g": 56,
    "b": 40
  },
  "hsl": {
    "h": 6.713,
    "s": 64.126,
    "l": 43.725
  },
  "oklch": {
    "l": 0.52647,
    "c": 0.1661,
    "h": 30.5
  },
  "luminance": 0.13049
}

Semantic roles & 50–950 ramp

primary

#B73828

secondary

#72BFC9

accent

#D5E741

background

#FEF7F5

surface

#FCEDEA

border

#D5C8C6

text

#160905

muted

#847B79

Preview Lab

Preview with #B73828

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

Preview Lab → · Contrast checker → · Palette generator →