#B31D40#B31D40

#B31D40 is a mid, vivid red. Relative luminance 0.108; OKLCH L 50.0% C 0.182 H 15.1°. Best body text is #FFFFFF at 6.63:1 contrast (WCAG AA passes).

Color values

HEX	#B31D40
RGB	rgb(179, 29, 64)
HSL	hsl(346, 72%, 41%)
HSV	hsv(346, 84%, 70%)
CMYK	cmyk(0%, 83.8%, 64.2%, 29.8%)
CIE-LAB	lab(39.30, 58.81, 19.71)
CIE-LCH	lch(39.30, 62.03, 18.53°)
OKLab	oklab(49.99% 0.1761 0.0475)
OKLCH	oklch(49.99% 0.182 15.1)
XYZ	xyz(19.9574, 10.8357, 5.8901)
Luminance	0.1083 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31D40 #1DB390

analogous

#B31D8B #B31D40 #B3451D

triadic

#B31D40 #40B31D #1D40B3

tetradic

#B31D40 #8BB31D #1DB390 #451DB3

square

#B31D40 #8BB31D #1DB390 #451DB3

split-complementary

#B31D40 #1DB345 #1D8BB3

monochromatic

#4A0C1A #7E142D #B31D40 #DD3058 #E66483

Accessibility & contrast

On white

6.63

#B31D40 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#B31D40 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31D40

6.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31D40	#FFFFFF	#000000	##FFFFFF
##B31D40	1.00	6.63	3.17	6.63
#FFFFFF	6.63	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B4940

Deuteranopia (green-blind)

#71673C

Tritanopia (blue-blind)

#C5002D

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #b31d40;
/* rgb */ color: rgb(179, 29, 64);
/* oklch */ color: oklch(50.0% 0.182 15.1);

Tailwind

colors: {
  custom: {
    50: '#d26b74',
    500: '#b31d40',
    950: '#000000',
  },
}

SCSS

$custom: #b31d40;
$custom-light: #d26b74;
$custom-dark: #000000;

JSON

{
  "hex": "#b31d40",
  "rgb": {
    "r": 179,
    "g": 29,
    "b": 64
  },
  "hsl": {
    "h": 346,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.49988,
    "c": 0.18241,
    "h": 15.1
  },
  "luminance": 0.10833
}

Semantic roles & 50–950 ramp

primary

#B31D40

secondary

#61CBB2

accent

#EFC439

background

#FDF6F7

surface

#FBECED

border

#D4C7C8

text

#150808

muted

#837A7B

Preview Lab

Preview with #B31D40

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

Preview Lab → · Contrast checker → · Palette generator →