#B3313A#B3313A

#B3313A is a mid, vivid red. Relative luminance 0.121; OKLCH L 51.5% C 0.166 H 21.6°. Best body text is #FFFFFF at 6.15:1 contrast (WCAG AA passes).

Color values

HEX	#B3313A
RGB	rgb(179, 49, 58)
HSL	hsl(356, 57%, 45%)
HSV	hsv(356, 73%, 70%)
CMYK	cmyk(0%, 72.6%, 67.6%, 29.8%)
CIE-LAB	lab(41.36, 52.40, 26.06)
CIE-LCH	lch(41.36, 58.52, 26.44°)
OKLab	oklab(51.48% 0.1543 0.0612)
OKLCH	oklch(51.48% 0.166 21.6)
XYZ	xyz(20.4546, 12.0889, 5.2585)
Luminance	0.1209 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B3313A #31B3AA

analogous

#B3317B #B3313A #B36931

triadic

#B3313A #3AB331 #313AB3

tetradic

#B3313A #7BB331 #31B3AA #6931B3

square

#B3313A #7BB331 #31B3AA #6931B3

split-complementary

#B3313A #31B369 #317BB3

monochromatic

#53171B #83242A #B3313A #D0525A #DD8288

Accessibility & contrast

On white

6.15

#B3313A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.42

#B3313A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B3313A

6.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B3313A	#FFFFFF	#000000	##FFFFFF
##B3313A	1.00	6.15	3.42	6.15
#FFFFFF	6.15	1.00	21.00	1.00
#000000	3.42	21.00	1.00	21.00
##FFFFFF	6.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#565039

Deuteranopia (green-blind)

#766C36

Tritanopia (blue-blind)

#C50035

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b3313a;
/* rgb */ color: rgb(179, 49, 58);
/* oklch */ color: oklch(51.5% 0.166 21.6);

Tailwind

colors: {
  custom: {
    50: '#d17370',
    500: '#b3313a',
    950: '#000000',
  },
}

SCSS

$custom: #b3313a;
$custom-light: #d17370;
$custom-dark: #000000;

JSON

{
  "hex": "#b3313a",
  "rgb": {
    "r": 179,
    "g": 49,
    "b": 58
  },
  "hsl": {
    "h": 355.846,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.51477,
    "c": 0.16599,
    "h": 21.6
  },
  "luminance": 0.12086
}

Semantic roles & 50–950 ramp

primary

#B3313A

secondary

#7AC6C1

accent

#E0D648

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #B3313A

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

Preview Lab → · Contrast checker → · Palette generator →