#B53133#B53133

#B53133 is a mid, vivid red. Relative luminance 0.123; OKLCH L 51.7% C 0.169 H 24.6°. Best body text is #FFFFFF at 6.08:1 contrast (WCAG AA passes).

Color values

HEX	#B53133
RGB	rgb(181, 49, 51)
HSL	hsl(359, 57%, 45%)
HSV	hsv(359, 73%, 71%)
CMYK	cmyk(0%, 72.9%, 71.8%, 29%)
CIE-LAB	lab(41.63, 52.68, 30.70)
CIE-LCH	lch(41.63, 60.97, 30.23°)
OKLab	oklab(51.72% 0.1534 0.0702)
OKLCH	oklch(51.72% 0.169 24.6)
XYZ	xyz(20.7542, 12.2625, 4.4054)
Luminance	0.1226 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B53133 #31B5B3

analogous

#B53175 #B53133 #B57131

triadic

#B53133 #33B531 #3133B5

tetradic

#B53133 #75B531 #31B5B3 #7131B5

square

#B53133 #75B531 #31B5B3 #7131B5

split-complementary

#B53133 #31B571 #3175B5

monochromatic

#551718 #852425 #B53133 #D05355 #DD8384

Accessibility & contrast

On white

6.08

#B53133 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.45

#B53133 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B53133

6.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B53133	#FFFFFF	#000000	##FFFFFF
##B53133	1.00	6.08	3.45	6.08
#FFFFFF	6.08	1.00	21.00	1.00
#000000	3.45	21.00	1.00	21.00
##FFFFFF	6.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#575032

Deuteranopia (green-blind)

#786D2F

Tritanopia (blue-blind)

#C70033

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b53133;
/* rgb */ color: rgb(181, 49, 51);
/* oklch */ color: oklch(51.7% 0.169 24.6);

Tailwind

colors: {
  custom: {
    50: '#d3736b',
    500: '#b53133',
    950: '#000000',
  },
}

SCSS

$custom: #b53133;
$custom-light: #d3736b;
$custom-dark: #000000;

JSON

{
  "hex": "#b53133",
  "rgb": {
    "r": 181,
    "g": 49,
    "b": 51
  },
  "hsl": {
    "h": 359.091,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.51716,
    "c": 0.16873,
    "h": 24.6
  },
  "luminance": 0.12259
}

Semantic roles & 50–950 ramp

primary

#B53133

secondary

#7BC7C6

accent

#E1DE47

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B53133

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

Preview Lab → · Contrast checker → · Palette generator →