#B5313A#B5313A

#B5313A is a mid, vivid red. Relative luminance 0.123; OKLCH L 51.8% C 0.168 H 21.8°. Best body text is #FFFFFF at 6.06:1 contrast (WCAG AA passes).

Color values

HEX	#B5313A
RGB	rgb(181, 49, 58)
HSL	hsl(356, 57%, 45%)
HSV	hsv(356, 73%, 71%)
CMYK	cmyk(0%, 72.9%, 68%, 29%)
CIE-LAB	lab(41.73, 53.03, 26.61)
CIE-LCH	lch(41.73, 59.33, 26.64°)
OKLab	oklab(51.83% 0.1561 0.0623)
OKLCH	oklch(51.83% 0.168 21.8)
XYZ	xyz(20.9204, 12.3290, 5.2803)
Luminance	0.1233 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B5313A #31B5AC

analogous

#B5317C #B5313A #B56A31

triadic

#B5313A #3AB531 #313AB5

tetradic

#B5313A #7CB531 #31B5AC #6A31B5

square

#B5313A #7CB531 #31B5AC #6A31B5

split-complementary

#B5313A #31B56A #317CB5

monochromatic

#55171B #85242B #B5313A #D0535B #DD8389

Accessibility & contrast

On white

6.06

#B5313A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.47

#B5313A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B5313A

6.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B5313A	#FFFFFF	#000000	##FFFFFF
##B5313A	1.00	6.06	3.47	6.06
#FFFFFF	6.06	1.00	21.00	1.00
#000000	3.47	21.00	1.00	21.00
##FFFFFF	6.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#565139

Deuteranopia (green-blind)

#786D36

Tritanopia (blue-blind)

#C70036

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b5313a;
/* rgb */ color: rgb(181, 49, 58);
/* oklch */ color: oklch(51.8% 0.168 21.8);

Tailwind

colors: {
  custom: {
    50: '#d37370',
    500: '#b5313a',
    950: '#000000',
  },
}

SCSS

$custom: #b5313a;
$custom-light: #d37370;
$custom-dark: #000000;

JSON

{
  "hex": "#b5313a",
  "rgb": {
    "r": 181,
    "g": 49,
    "b": 58
  },
  "hsl": {
    "h": 355.909,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.51827,
    "c": 0.16804,
    "h": 21.8
  },
  "luminance": 0.12326
}

Semantic roles & 50–950 ramp

primary

#B5313A

secondary

#7BC7C2

accent

#E1D647

background

#FEF7F6

surface

#FCEDEC

border

#D5C8C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #B5313A

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

Preview Lab → · Contrast checker → · Palette generator →