#B31415#B31415

#B31415 is a mid, vivid red. Relative luminance 0.101; OKLCH L 48.9% C 0.190 H 27.9°. Best body text is #FFFFFF at 6.94:1 contrast (WCAG AA passes).

Color values

HEX	#B31415
RGB	rgb(179, 20, 21)
HSL	hsl(360, 80%, 39%)
HSV	hsv(360, 89%, 70%)
CMYK	cmyk(0%, 88.8%, 88.3%, 29.8%)
CIE-LAB	lab(38.09, 59.07, 43.60)
CIE-LCH	lch(38.09, 73.42, 36.43°)
OKLab	oklab(48.92% 0.1678 0.0887)
OKLCH	oklch(48.92% 0.19 27.9)
XYZ	xyz(18.9784, 10.1414, 1.6676)
Luminance	0.1014 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31415 #14B3B2

analogous

#B31465 #B31415 #B36314

triadic

#B31415 #15B314 #1415B3

tetradic

#B31415 #65B314 #14B3B2 #6314B3

square

#B31415 #65B314 #14B3B2 #6314B3

split-complementary

#B31415 #14B363 #1465B3

monochromatic

#450808 #7C0E0F #B31415 #E61E20 #EC5556

Accessibility & contrast

On white

6.94

#B31415 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.03

#B31415 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31415

6.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31415	#FFFFFF	#000000	##FFFFFF
##B31415	1.00	6.94	3.03	6.94
#FFFFFF	6.94	1.00	21.00	1.00
#000000	3.03	21.00	1.00	21.00
##FFFFFF	6.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D4411

Deuteranopia (green-blind)

#736507

Tritanopia (blue-blind)

#C60018

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #b31415;
/* rgb */ color: rgb(179, 20, 21);
/* oklch */ color: oklch(48.9% 0.190 27.9);

Tailwind

colors: {
  custom: {
    50: '#d56855',
    500: '#b31415',
    950: '#000000',
  },
}

SCSS

$custom: #b31415;
$custom-light: #d56855;
$custom-dark: #000000;

JSON

{
  "hex": "#b31415",
  "rgb": {
    "r": 179,
    "g": 20,
    "b": 21
  },
  "hsl": {
    "h": 359.623,
    "s": 79.899,
    "l": 39.02
  },
  "oklch": {
    "l": 0.48921,
    "c": 0.18978,
    "h": 27.9
  },
  "luminance": 0.10138
}

Semantic roles & 50–950 ramp

primary

#B31415

secondary

#54CFCE

accent

#F6F531

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#170703

muted

#857A78

Preview Lab

Preview with #B31415

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

Preview Lab → · Contrast checker → · Palette generator →