#B5303A#B5303A

#B5303A is a mid, vivid red. Relative luminance 0.122; OKLCH L 51.7% C 0.169 H 21.5°. Best body text is #FFFFFF at 6.09:1 contrast (WCAG AA passes).

Color values

HEX	#B5303A
RGB	rgb(181, 48, 58)
HSL	hsl(355, 58%, 45%)
HSV	hsv(355, 73%, 71%)
CMYK	cmyk(0%, 73.5%, 68%, 29%)
CIE-LAB	lab(41.60, 53.39, 26.45)
CIE-LCH	lch(41.60, 59.58, 26.35°)
OKLab	oklab(51.73% 0.1572 0.062)
OKLCH	oklch(51.73% 0.169 21.5)
XYZ	xyz(20.8790, 12.2463, 5.2665)
Luminance	0.1224 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B5303A #30B5AB

analogous

#B5307C #B5303A #B56930

triadic

#B5303A #3AB530 #303AB5

tetradic

#B5303A #7CB530 #30B5AB #6930B5

square

#B5303A #7CB530 #30B5AB #6930B5

split-complementary

#B5303A #30B569 #307CB5

monochromatic

#54161B #85232A #B5303A #D1515B #DE8289

Accessibility & contrast

On white

6.09

#B5303A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.45

#B5303A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B5303A

6.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B5303A	#FFFFFF	#000000	##FFFFFF
##B5303A	1.00	6.09	3.45	6.09
#FFFFFF	6.09	1.00	21.00	1.00
#000000	3.45	21.00	1.00	21.00
##FFFFFF	6.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#565039

Deuteranopia (green-blind)

#776C36

Tritanopia (blue-blind)

#C70035

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b5303a;
/* rgb */ color: rgb(181, 48, 58);
/* oklch */ color: oklch(51.7% 0.169 21.5);

Tailwind

colors: {
  custom: {
    50: '#d37370',
    500: '#b5303a',
    950: '#000000',
  },
}

SCSS

$custom: #b5303a;
$custom-light: #d37370;
$custom-dark: #000000;

JSON

{
  "hex": "#b5303a",
  "rgb": {
    "r": 181,
    "g": 48,
    "b": 58
  },
  "hsl": {
    "h": 355.489,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.5173,
    "c": 0.16897,
    "h": 21.5
  },
  "luminance": 0.12243
}

Semantic roles & 50–950 ramp

primary

#B5303A

secondary

#7AC7C1

accent

#E1D646

background

#FEF7F6

surface

#FCEDEC

border

#D5C8C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #B5303A

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

Preview Lab → · Contrast checker → · Palette generator →