#B73531#B73531

#B73531 is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.4% C 0.167 H 26.5°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#B73531
RGB	rgb(183, 53, 49)
HSL	hsl(2, 58%, 45%)
HSV	hsv(2, 73%, 72%)
CMYK	cmyk(0%, 71%, 73.2%, 28.2%)
CIE-LAB	lab(42.52, 51.74, 33.01)
CIE-LCH	lch(42.52, 61.38, 32.53°)
OKLab	oklab(52.44% 0.1498 0.0747)
OKLCH	oklch(52.44% 0.167 26.5)
XYZ	xyz(21.3583, 12.8384, 4.2586)
Luminance	0.1283 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73531 #31B3B7

analogous

#B73170 #B73531 #B77831

triadic

#B73531 #31B735 #3531B7

tetradic

#B73531 #70B731 #31B3B7 #7831B7

square

#B73531 #70B731 #31B3B7 #7831B7

split-complementary

#B73531 #31B778 #3170B7

monochromatic

#561917 #872724 #B73531 #D15854 #DE8784

Accessibility & contrast

On white

5.89

#B73531 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#B73531 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73531

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73531	#FFFFFF	#000000	##FFFFFF
##B73531	1.00	5.89	3.57	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A522F

Deuteranopia (green-blind)

#7B6F2C

Tritanopia (blue-blind)

#C90235

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b73531;
/* rgb */ color: rgb(183, 53, 49);
/* oklch */ color: oklch(52.4% 0.167 26.5);

Tailwind

colors: {
  custom: {
    50: '#d57569',
    500: '#b73531',
    950: '#000000',
  },
}

SCSS

$custom: #b73531;
$custom-light: #d57569;
$custom-dark: #000000;

JSON

{
  "hex": "#b73531",
  "rgb": {
    "r": 183,
    "g": 53,
    "b": 49
  },
  "hsl": {
    "h": 1.791,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.52439,
    "c": 0.16739,
    "h": 26.5
  },
  "luminance": 0.12835
}

Semantic roles & 50–950 ramp

primary

#B73531

secondary

#7CC5C8

accent

#DCE147

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B73531

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

Preview Lab → · Contrast checker → · Palette generator →