#B53137#B53137

#B53137 is a mid, vivid red. Relative luminance 0.123; OKLCH L 51.8% C 0.168 H 23.0°. Best body text is #FFFFFF at 6.07:1 contrast (WCAG AA passes).

Color values

HEX	#B53137
RGB	rgb(181, 49, 55)
HSL	hsl(357, 57%, 45%)
HSV	hsv(357, 73%, 71%)
CMYK	cmyk(0%, 72.9%, 69.6%, 29%)
CIE-LAB	lab(41.69, 52.88, 28.37)
CIE-LCH	lch(41.69, 60.01, 28.22°)
OKLab	oklab(51.78% 0.1549 0.0658)
OKLCH	oklch(51.78% 0.168 23)
XYZ	xyz(20.8463, 12.2993, 4.8900)
Luminance	0.1230 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B53137 #31B5AF

analogous

#B53179 #B53137 #B56D31

triadic

#B53137 #37B531 #3137B5

tetradic

#B53137 #79B531 #31B5AF #6D31B5

square

#B53137 #79B531 #31B5AF #6D31B5

split-complementary

#B53137 #31B56D #3179B5

monochromatic

#55171A #852428 #B53137 #D05359 #DD8387

Accessibility & contrast

On white

6.07

#B53137 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.46

#B53137 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B53137

6.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B53137	#FFFFFF	#000000	##FFFFFF
##B53137	1.00	6.07	3.46	6.07
#FFFFFF	6.07	1.00	21.00	1.00
#000000	3.46	21.00	1.00	21.00
##FFFFFF	6.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#575036

Deuteranopia (green-blind)

#786D33

Tritanopia (blue-blind)

#C70035

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b53137;
/* rgb */ color: rgb(181, 49, 55);
/* oklch */ color: oklch(51.8% 0.168 23.0);

Tailwind

colors: {
  custom: {
    50: '#d3736e',
    500: '#b53137',
    950: '#000000',
  },
}

SCSS

$custom: #b53137;
$custom-light: #d3736e;
$custom-dark: #000000;

JSON

{
  "hex": "#b53137",
  "rgb": {
    "r": 181,
    "g": 49,
    "b": 55
  },
  "hsl": {
    "h": 357.273,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.51777,
    "c": 0.16831,
    "h": 23
  },
  "luminance": 0.12296
}

Semantic roles & 50–950 ramp

primary

#B53137

secondary

#7BC7C3

accent

#E1DA47

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #B53137

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

Preview Lab → · Contrast checker → · Palette generator →