#B31B20#B31B20

#B31B20 is a mid, vivid red. Relative luminance 0.105; OKLCH L 49.4% C 0.185 H 26.2°. Best body text is #FFFFFF at 6.79:1 contrast (WCAG AA passes).

Color values

HEX	#B31B20
RGB	rgb(179, 27, 32)
HSL	hsl(358, 74%, 40%)
HSV	hsv(358, 85%, 70%)
CMYK	cmyk(0%, 84.9%, 82.1%, 29.8%)
CIE-LAB	lab(38.68, 57.91, 38.40)
CIE-LCH	lch(38.68, 69.48, 33.55°)
OKLab	oklab(49.38% 0.1661 0.0819)
OKLCH	oklch(49.38% 0.185 26.2)
XYZ	xyz(19.2455, 10.4751, 2.3748)
Luminance	0.1047 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31B20 #1BB3AE

analogous

#B31B6C #B31B20 #B3621B

triadic

#B31B20 #20B31B #1B20B3

tetradic

#B31B20 #6CB31B #1BB3AE #621BB3

square

#B31B20 #6CB31B #1BB3AE #621BB3

split-complementary

#B31B20 #1BB362 #1B6CB3

monochromatic

#490B0D #7E1316 #B31B20 #DF2C32 #E76166

Accessibility & contrast

On white

6.79

#B31B20 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.09

#B31B20 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31B20

6.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31B20	#FFFFFF	#000000	##FFFFFF
##B31B20	1.00	6.79	3.09	6.79
#FFFFFF	6.79	1.00	21.00	1.00
#000000	3.09	21.00	1.00	21.00
##FFFFFF	6.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F461E

Deuteranopia (green-blind)

#736718

Tritanopia (blue-blind)

#C60020

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #b31b20;
/* rgb */ color: rgb(179, 27, 32);
/* oklch */ color: oklch(49.4% 0.185 26.2);

Tailwind

colors: {
  custom: {
    50: '#d46a5c',
    500: '#b31b20',
    950: '#000000',
  },
}

SCSS

$custom: #b31b20;
$custom-light: #d46a5c;
$custom-dark: #000000;

JSON

{
  "hex": "#b31b20",
  "rgb": {
    "r": 179,
    "g": 27,
    "b": 32
  },
  "hsl": {
    "h": 358.026,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.49384,
    "c": 0.1852,
    "h": 26.2
  },
  "luminance": 0.10472
}

Semantic roles & 50–950 ramp

primary

#B31B20

secondary

#5ECCC8

accent

#F0EA37

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160704

muted

#847A79

Preview Lab

Preview with #B31B20

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

Preview Lab → · Contrast checker → · Palette generator →