#B73B31#B73B31

#B73B31 is a mid, vivid red. Relative luminance 0.134; OKLCH L 53.1% C 0.162 H 28.4°. Best body text is #FFFFFF at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#B73B31
RGB	rgb(183, 59, 49)
HSL	hsl(4, 58%, 45%)
HSV	hsv(4, 73%, 72%)
CMYK	cmyk(0%, 67.8%, 73.2%, 28.2%)
CIE-LAB	lab(43.39, 49.37, 34.00)
CIE-LCH	lch(43.39, 59.94, 34.55°)
OKLab	oklab(53.09% 0.1423 0.0769)
OKLCH	oklch(53.09% 0.162 28.4)
XYZ	xyz(21.6492, 13.4201, 4.3555)
Luminance	0.1342 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73B31 #31ADB7

analogous

#B7316A #B73B31 #B77E31

triadic

#B73B31 #31B73B #3B31B7

tetradic

#B73B31 #6AB731 #31ADB7 #7E31B7

square

#B73B31 #6AB731 #31ADB7 #7E31B7

split-complementary

#B73B31 #31B77E #316AB7

monochromatic

#561C17 #872B24 #B73B31 #D15D54 #DE8B84

Accessibility & contrast

On white

5.70

#B73B31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#B73B31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73B31

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73B31	#FFFFFF	#000000	##FFFFFF
##B73B31	1.00	5.70	3.68	5.70
#FFFFFF	5.70	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E552F

Deuteranopia (green-blind)

#7D702D

Tritanopia (blue-blind)

#C9163A

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b73b31;
/* rgb */ color: rgb(183, 59, 49);
/* oklch */ color: oklch(53.1% 0.162 28.4);

Tailwind

colors: {
  custom: {
    50: '#d5786a',
    500: '#b73b31',
    950: '#000000',
  },
}

SCSS

$custom: #b73b31;
$custom-light: #d5786a;
$custom-dark: #000000;

JSON

{
  "hex": "#b73b31",
  "rgb": {
    "r": 183,
    "g": 59,
    "b": 49
  },
  "hsl": {
    "h": 4.478,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.5309,
    "c": 0.16175,
    "h": 28.4
  },
  "luminance": 0.13417
}

Semantic roles & 50–950 ramp

primary

#B73B31

secondary

#7CC2C8

accent

#D5E147

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B73B31

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

Preview Lab → · Contrast checker → · Palette generator →