#B31E1C#B31E1C

#B31E1C is a mid, vivid red. Relative luminance 0.106; OKLCH L 49.5% C 0.184 H 27.7°. Best body text is #FFFFFF at 6.73:1 contrast (WCAG AA passes).

Color values

HEX	#B31E1C
RGB	rgb(179, 30, 28)
HSL	hsl(1, 73%, 41%)
HSV	hsv(1, 84%, 70%)
CMYK	cmyk(0%, 83.2%, 84.4%, 29.8%)
CIE-LAB	lab(38.90, 57.09, 40.76)
CIE-LCH	lch(38.90, 70.15, 35.53°)
OKLab	oklab(49.53% 0.1628 0.0855)
OKLCH	oklch(49.53% 0.184 27.7)
XYZ	xyz(19.2667, 10.5993, 2.1298)
Luminance	0.1060 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31E1C #1CB1B3

analogous

#B31C65 #B31E1C #B36A1C

triadic

#B31E1C #1CB31E #1E1CB3

tetradic

#B31E1C #65B31C #1CB1B3 #6A1CB3

square

#B31E1C #65B31C #1CB1B3 #6A1CB3

split-complementary

#B31E1C #1CB36A #1C65B3

monochromatic

#490C0B #7E1514 #B31E1C #DE302E #E76563

Accessibility & contrast

On white

6.73

#B31E1C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#B31E1C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31E1C

6.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31E1C	#FFFFFF	#000000	##FFFFFF
##B31E1C	1.00	6.73	3.12	6.73
#FFFFFF	6.73	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#504719

Deuteranopia (green-blind)

#746713

Tritanopia (blue-blind)

#C60020

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31e1c;
/* rgb */ color: rgb(179, 30, 28);
/* oklch */ color: oklch(49.5% 0.184 27.7);

Tailwind

colors: {
  custom: {
    50: '#d46b5a',
    500: '#b31e1c',
    950: '#000000',
  },
}

SCSS

$custom: #b31e1c;
$custom-light: #d46b5a;
$custom-dark: #000000;

JSON

{
  "hex": "#b31e1c",
  "rgb": {
    "r": 179,
    "g": 30,
    "b": 28
  },
  "hsl": {
    "h": 0.795,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.49532,
    "c": 0.18386,
    "h": 27.7
  },
  "luminance": 0.10596
}

Semantic roles & 50–950 ramp

primary

#B31E1C

secondary

#5FCACB

accent

#EDF038

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160704

muted

#847A79

Preview Lab

Preview with #B31E1C

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

Preview Lab → · Contrast checker → · Palette generator →