#B31F40#B31F40

#B31F40 is a mid, vivid red. Relative luminance 0.109; OKLCH L 50.1% C 0.181 H 15.4°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#B31F40
RGB	rgb(179, 31, 64)
HSL	hsl(347, 70%, 41%)
HSV	hsv(347, 83%, 70%)
CMYK	cmyk(0%, 82.7%, 64.2%, 29.8%)
CIE-LAB	lab(39.47, 58.32, 19.93)
CIE-LCH	lch(39.47, 61.63, 18.87°)
OKLab	oklab(50.11% 0.1745 0.048)
OKLCH	oklch(50.11% 0.181 15.4)
XYZ	xyz(20.0080, 10.9369, 5.9070)
Luminance	0.1093 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31F40 #1FB392

analogous

#B31F8A #B31F40 #B3481F

triadic

#B31F40 #40B31F #1F40B3

tetradic

#B31F40 #8AB31F #1FB392 #481FB3

square

#B31F40 #8AB31F #1FB392 #481FB3

split-complementary

#B31F40 #1FB348 #1F8AB3

monochromatic

#4B0D1B #7F162D #B31F40 #DC3359 #E56884

Accessibility & contrast

On white

6.59

#B31F40 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#B31F40 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31F40

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31F40	#FFFFFF	#000000	##FFFFFF
##B31F40	1.00	6.59	3.19	6.59
#FFFFFF	6.59	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C4940

Deuteranopia (green-blind)

#71683C

Tritanopia (blue-blind)

#C5002E

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #b31f40;
/* rgb */ color: rgb(179, 31, 64);
/* oklch */ color: oklch(50.1% 0.181 15.4);

Tailwind

colors: {
  custom: {
    50: '#d26c74',
    500: '#b31f40',
    950: '#000000',
  },
}

SCSS

$custom: #b31f40;
$custom-light: #d26c74;
$custom-dark: #000000;

JSON

{
  "hex": "#b31f40",
  "rgb": {
    "r": 179,
    "g": 31,
    "b": 64
  },
  "hsl": {
    "h": 346.622,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.50115,
    "c": 0.18103,
    "h": 15.4
  },
  "luminance": 0.10934
}

Semantic roles & 50–950 ramp

primary

#B31F40

secondary

#64CAB3

accent

#EDC53B

background

#FDF6F7

surface

#FBECED

border

#D4C7C8

text

#150808

muted

#837A7B

Preview Lab

Preview with #B31F40

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

Preview Lab → · Contrast checker → · Palette generator →