#B0313A#B0313A

#B0313A is a mid, vivid red. Relative luminance 0.117; OKLCH L 51.0% C 0.163 H 21.4°. Best body text is #FFFFFF at 6.28:1 contrast (WCAG AA passes).

Color values

HEX	#B0313A
RGB	rgb(176, 49, 58)
HSL	hsl(356, 56%, 44%)
HSV	hsv(356, 72%, 69%)
CMYK	cmyk(0%, 72.2%, 67%, 31%)
CIE-LAB	lab(40.79, 51.45, 25.23)
CIE-LCH	lch(40.79, 57.31, 26.12°)
OKLab	oklab(50.95% 0.1517 0.0595)
OKLCH	oklch(50.95% 0.163 21.4)
XYZ	xyz(19.7686, 11.7351, 5.2263)
Luminance	0.1173 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B0313A #31B0A7

analogous

#B0317A #B0313A #B06831

triadic

#B0313A #3AB031 #313AB0

tetradic

#B0313A #7AB031 #31B0A7 #6831B0

square

#B0313A #7AB031 #31B0A7 #6831B0

split-complementary

#B0313A #31B068 #317AB0

monochromatic

#50161A #80242A #B0313A #CE5059 #DC8086

Accessibility & contrast

On white

6.28

#B0313A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.35

#B0313A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B0313A

6.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B0313A	#FFFFFF	#000000	##FFFFFF
##B0313A	1.00	6.28	3.35	6.28
#FFFFFF	6.28	1.00	21.00	1.00
#000000	3.35	21.00	1.00	21.00
##FFFFFF	6.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#554F39

Deuteranopia (green-blind)

#746A36

Tritanopia (blue-blind)

#C10335

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b0313a;
/* rgb */ color: rgb(176, 49, 58);
/* oklch */ color: oklch(51.0% 0.163 21.4);

Tailwind

colors: {
  custom: {
    50: '#cf7270',
    500: '#b0313a',
    950: '#000000',
  },
}

SCSS

$custom: #b0313a;
$custom-light: #cf7270;
$custom-dark: #000000;

JSON

{
  "hex": "#b0313a",
  "rgb": {
    "r": 176,
    "g": 49,
    "b": 58
  },
  "hsl": {
    "h": 355.748,
    "s": 56.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.50953,
    "c": 0.1629,
    "h": 21.4
  },
  "luminance": 0.11732
}

Semantic roles & 50–950 ramp

primary

#B0313A

secondary

#78C5BF

accent

#E0D548

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #B0313A

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

Preview Lab → · Contrast checker → · Palette generator →