#B31E2B#B31E2B

#B31E2B is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.7% C 0.182 H 23.4°. Best body text is #FFFFFF at 6.69:1 contrast (WCAG AA passes).

Color values

HEX	#B31E2B
RGB	rgb(179, 30, 43)
HSL	hsl(355, 71%, 41%)
HSV	hsv(355, 83%, 70%)
CMYK	cmyk(0%, 83.2%, 76%, 29.8%)
CIE-LAB	lab(39.05, 57.56, 32.42)
CIE-LCH	lch(39.05, 66.07, 29.39°)
OKLab	oklab(49.7% 0.1674 0.0723)
OKLCH	oklch(49.7% 0.182 23.4)
XYZ	xyz(19.4931, 10.6898, 3.3220)
Luminance	0.1069 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31E2B #1EB3A6

analogous

#B31E75 #B31E2B #B35B1E

triadic

#B31E2B #2BB31E #1E2BB3

tetradic

#B31E2B #75B31E #1EB3A6 #5B1EB3

square

#B31E2B #75B31E #1EB3A6 #5B1EB3

split-complementary

#B31E2B #1EB35B #1E75B3

monochromatic

#4A0C12 #7F151E #B31E2B #DD3241 #E56671

Accessibility & contrast

On white

6.69

#B31E2B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#B31E2B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31E2B

6.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31E2B	#FFFFFF	#000000	##FFFFFF
##B31E2B	1.00	6.69	3.14	6.69
#FFFFFF	6.69	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F482A

Deuteranopia (green-blind)

#736725

Tritanopia (blue-blind)

#C50025

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31e2b;
/* rgb */ color: rgb(179, 30, 43);
/* oklch */ color: oklch(49.7% 0.182 23.4);

Tailwind

colors: {
  custom: {
    50: '#d36b64',
    500: '#b31e2b',
    950: '#000000',
  },
}

SCSS

$custom: #b31e2b;
$custom-light: #d36b64;
$custom-dark: #000000;

JSON

{
  "hex": "#b31e2b",
  "rgb": {
    "r": 179,
    "g": 30,
    "b": 43
  },
  "hsl": {
    "h": 354.765,
    "s": 71.292,
    "l": 40.98
  },
  "oklch": {
    "l": 0.49697,
    "c": 0.18236,
    "h": 23.4
  },
  "luminance": 0.10687
}

Semantic roles & 50–950 ramp

primary

#B31E2B

secondary

#62CBC1

accent

#EEDE3A

background

#FEF6F6

surface

#FCECEB

border

#D5C7C6

text

#160805

muted

#847A7A

Preview Lab

Preview with #B31E2B

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

Preview Lab → · Contrast checker → · Palette generator →