#B31F23#B31F23

#B31F23 is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.7% C 0.182 H 26.0°. Best body text is #FFFFFF at 6.69:1 contrast (WCAG AA passes).

Color values

HEX	#B31F23
RGB	rgb(179, 31, 35)
HSL	hsl(358, 70%, 41%)
HSV	hsv(358, 83%, 70%)
CMYK	cmyk(0%, 82.7%, 80.4%, 29.8%)
CIE-LAB	lab(39.05, 57.04, 37.09)
CIE-LCH	lch(39.05, 68.03, 33.03°)
OKLab	oklab(49.67% 0.164 0.0801)
OKLCH	oklch(49.67% 0.182 26)
XYZ	xyz(19.3862, 10.6882, 2.6321)
Luminance	0.1069 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31F23 #1FB3AF

analogous

#B31F6D #B31F23 #B3651F

triadic

#B31F23 #23B31F #1F23B3

tetradic

#B31F23 #6DB31F #1FB3AF #651FB3

square

#B31F23 #6DB31F #1FB3AF #651FB3

split-complementary

#B31F23 #1FB365 #1F6DB3

monochromatic

#4B0D0F #7F1619 #B31F23 #DC3338 #E5686B

Accessibility & contrast

On white

6.69

#B31F23 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#B31F23 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31F23

6.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31F23	#FFFFFF	#000000	##FFFFFF
##B31F23	1.00	6.69	3.14	6.69
#FFFFFF	6.69	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#504821

Deuteranopia (green-blind)

#74671C

Tritanopia (blue-blind)

#C60023

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31f23;
/* rgb */ color: rgb(179, 31, 35);
/* oklch */ color: oklch(49.7% 0.182 26.0);

Tailwind

colors: {
  custom: {
    50: '#d36b5f',
    500: '#b31f23',
    950: '#000000',
  },
}

SCSS

$custom: #b31f23;
$custom-light: #d36b5f;
$custom-dark: #000000;

JSON

{
  "hex": "#b31f23",
  "rgb": {
    "r": 179,
    "g": 31,
    "b": 35
  },
  "hsl": {
    "h": 358.378,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.49666,
    "c": 0.18249,
    "h": 26
  },
  "luminance": 0.10685
}

Semantic roles & 50–950 ramp

primary

#B31F23

secondary

#64CAC7

accent

#EDE83B

background

#FEF6F5

surface

#FCECE9

border

#D5C7C5

text

#160804

muted

#847A79

Preview Lab

Preview with #B31F23

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

Preview Lab → · Contrast checker → · Palette generator →