#B31F22#B31F22

#B31F22 is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.7% C 0.183 H 26.3°. Best body text is #FFFFFF at 6.70:1 contrast (WCAG AA passes).

Color values

HEX	#B31F22
RGB	rgb(179, 31, 34)
HSL	hsl(359, 70%, 41%)
HSV	hsv(359, 83%, 70%)
CMYK	cmyk(0%, 82.7%, 81%, 29.8%)
CIE-LAB	lab(39.04, 57.00, 37.64)
CIE-LCH	lch(39.04, 68.31, 33.44°)
OKLab	oklab(49.66% 0.1637 0.0809)
OKLCH	oklch(49.66% 0.183 26.3)
XYZ	xyz(19.3715, 10.6824, 2.5550)
Luminance	0.1068 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31F22 #1FB3B0

analogous

#B31F6C #B31F22 #B3661F

triadic

#B31F22 #22B31F #1F22B3

tetradic

#B31F22 #6CB31F #1FB3B0 #661FB3

square

#B31F22 #6CB31F #1FB3B0 #661FB3

split-complementary

#B31F22 #1FB366 #1F6CB3

monochromatic

#4B0D0E #7F1618 #B31F22 #DC3337 #E5686A

Accessibility & contrast

On white

6.70

#B31F22 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#B31F22 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31F22

6.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31F22	#FFFFFF	#000000	##FFFFFF
##B31F22	1.00	6.70	3.14	6.70
#FFFFFF	6.70	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#504820

Deuteranopia (green-blind)

#74671B

Tritanopia (blue-blind)

#C60023

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31f22;
/* rgb */ color: rgb(179, 31, 34);
/* oklch */ color: oklch(49.7% 0.183 26.3);

Tailwind

colors: {
  custom: {
    50: '#d46b5e',
    500: '#b31f22',
    950: '#000000',
  },
}

SCSS

$custom: #b31f22;
$custom-light: #d46b5e;
$custom-dark: #000000;

JSON

{
  "hex": "#b31f22",
  "rgb": {
    "r": 179,
    "g": 31,
    "b": 34
  },
  "hsl": {
    "h": 358.784,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.49655,
    "c": 0.1826,
    "h": 26.3
  },
  "luminance": 0.10679
}

Semantic roles & 50–950 ramp

primary

#B31F22

secondary

#64CAC8

accent

#EDEA3B

background

#FEF6F5

surface

#FCECE9

border

#D5C7C5

text

#160804

muted

#847A79

Preview Lab

Preview with #B31F22

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

Preview Lab → · Contrast checker → · Palette generator →