#B53837#B53837

#B53837 is a mid, vivid red. Relative luminance 0.129; OKLCH L 52.5% C 0.162 H 25.0°. Best body text is #FFFFFF at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#B53837
RGB	rgb(181, 56, 55)
HSL	hsl(0, 53%, 46%)
HSV	hsv(0, 70%, 71%)
CMYK	cmyk(0%, 69.1%, 69.6%, 29%)
CIE-LAB	lab(42.66, 50.21, 29.54)
CIE-LCH	lch(42.66, 58.25, 30.47°)
OKLab	oklab(52.5% 0.1464 0.0684)
OKLCH	oklch(52.5% 0.162 25)
XYZ	xyz(21.1621, 12.9310, 4.9953)
Luminance	0.1293 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B53837 #37B4B5

analogous

#B53775 #B53837 #B57737

triadic

#B53837 #37B538 #3837B5

tetradic

#B53837 #75B537 #37B4B5 #7737B5

square

#B53837 #75B537 #37B4B5 #7737B5

split-complementary

#B53837 #37B577 #3775B5

monochromatic

#571B1A #862929 #B53837 #CD5D5C #DC8B8B

Accessibility & contrast

On white

5.86

#B53837 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.59

#B53837 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B53837

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B53837	#FFFFFF	#000000	##FFFFFF
##B53837	1.00	5.86	3.59	5.86
#FFFFFF	5.86	1.00	21.00	1.00
#000000	3.59	21.00	1.00	21.00
##FFFFFF	5.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5436

Deuteranopia (green-blind)

#7A6F33

Tritanopia (blue-blind)

#C71239

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b53837;
/* rgb */ color: rgb(181, 56, 55);
/* oklch */ color: oklch(52.5% 0.162 25.0);

Tailwind

colors: {
  custom: {
    50: '#d3766e',
    500: '#b53837',
    950: '#000000',
  },
}

SCSS

$custom: #b53837;
$custom-light: #d3766e;
$custom-dark: #000000;

JSON

{
  "hex": "#b53837",
  "rgb": {
    "r": 181,
    "g": 56,
    "b": 55
  },
  "hsl": {
    "h": 0.476,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.52502,
    "c": 0.16162,
    "h": 25
  },
  "luminance": 0.12928
}

Semantic roles & 50–950 ramp

primary

#B53837

secondary

#82C5C6

accent

#DCDD4B

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #B53837

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

Preview Lab → · Contrast checker → · Palette generator →