#B13131#B13131

#B13131 is a mid, vivid red. Relative luminance 0.118; OKLCH L 51.0% C 0.165 H 25.2°. Best body text is #FFFFFF at 6.26:1 contrast (WCAG AA passes).

Color values

HEX	#B13131
RGB	rgb(177, 49, 49)
HSL	hsl(0, 57%, 44%)
HSV	hsv(0, 72%, 69%)
CMYK	cmyk(0%, 72.3%, 72.3%, 30.6%)
CIE-LAB	lab(40.85, 51.31, 30.79)
CIE-LCH	lch(40.85, 59.83, 30.96°)
OKLab	oklab(50.98% 0.1492 0.0702)
OKLCH	oklch(50.98% 0.165 25.2)
XYZ	xyz(19.7864, 11.7685, 4.1348)
Luminance	0.1177 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B13131 #31B1B1

analogous

#B13171 #B13131 #B17131

triadic

#B13131 #31B131 #3131B1

tetradic

#B13131 #71B131 #31B1B1 #7131B1

square

#B13131 #71B131 #31B1B1 #7131B1

split-complementary

#B13131 #31B171 #3171B1

monochromatic

#511616 #812424 #B13131 #CF5151 #DC8080

Accessibility & contrast

On white

6.26

#B13131 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.35

#B13131 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B13131

6.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B13131	#FFFFFF	#000000	##FFFFFF
##B13131	1.00	6.26	3.35	6.26
#FFFFFF	6.26	1.00	21.00	1.00
#000000	3.35	21.00	1.00	21.00
##FFFFFF	6.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#564F30

Deuteranopia (green-blind)

#766A2D

Tritanopia (blue-blind)

#C30033

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b13131;
/* rgb */ color: rgb(177, 49, 49);
/* oklch */ color: oklch(51.0% 0.165 25.2);

Tailwind

colors: {
  custom: {
    50: '#d07269',
    500: '#b13131',
    950: '#000000',
  },
}

SCSS

$custom: #b13131;
$custom-light: #d07269;
$custom-dark: #000000;

JSON

{
  "hex": "#b13131",
  "rgb": {
    "r": 177,
    "g": 49,
    "b": 49
  },
  "hsl": {
    "h": 0,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.50984,
    "c": 0.16486,
    "h": 25.2
  },
  "luminance": 0.11765
}

Semantic roles & 50–950 ramp

primary

#B13131

secondary

#79C5C5

accent

#E0E048

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150806

muted

#837B7A

Preview Lab

Preview with #B13131

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

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