#B31F24#B31F24

#B31F24 is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.7% C 0.182 H 25.7°. Best body text is #FFFFFF at 6.69:1 contrast (WCAG AA passes).

Color values

HEX	#B31F24
RGB	rgb(179, 31, 36)
HSL	hsl(358, 70%, 41%)
HSV	hsv(358, 83%, 70%)
CMYK	cmyk(0%, 82.7%, 79.9%, 29.8%)
CIE-LAB	lab(39.06, 57.07, 36.53)
CIE-LCH	lch(39.06, 67.76, 32.62°)
OKLab	oklab(49.68% 0.1643 0.0792)
OKLCH	oklch(49.68% 0.182 25.7)
XYZ	xyz(19.4012, 10.6942, 2.7114)
Luminance	0.1069 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31F24 #1FB3AE

analogous

#B31F6E #B31F24 #B3641F

triadic

#B31F24 #24B31F #1F24B3

tetradic

#B31F24 #6EB31F #1FB3AE #641FB3

square

#B31F24 #6EB31F #1FB3AE #641FB3

split-complementary

#B31F24 #1FB364 #1F6EB3

monochromatic

#4B0D0F #7F161A #B31F24 #DC3339 #E5686C

Accessibility & contrast

On white

6.69

#B31F24 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#B31F24 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31F24

6.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31F24	#FFFFFF	#000000	##FFFFFF
##B31F24	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)

#504822

Deuteranopia (green-blind)

#74671D

Tritanopia (blue-blind)

#C60023

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31f24;
/* rgb */ color: rgb(179, 31, 36);
/* oklch */ color: oklch(49.7% 0.182 25.7);

Tailwind

colors: {
  custom: {
    50: '#d36b5f',
    500: '#b31f24',
    950: '#000000',
  },
}

SCSS

$custom: #b31f24;
$custom-light: #d36b5f;
$custom-dark: #000000;

JSON

{
  "hex": "#b31f24",
  "rgb": {
    "r": 179,
    "g": 31,
    "b": 36
  },
  "hsl": {
    "h": 357.973,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.49677,
    "c": 0.18239,
    "h": 25.7
  },
  "luminance": 0.10691
}

Semantic roles & 50–950 ramp

primary

#B31F24

secondary

#64CAC7

accent

#EDE73B

background

#FEF6F5

surface

#FCECE9

border

#D5C7C5

text

#160804

muted

#847A79

Preview Lab

Preview with #B31F24

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

Preview Lab → · Contrast checker → · Palette generator →