#B31D25#B31D25

#B31D25 is a mid, vivid red. Relative luminance 0.106; OKLCH L 49.6% C 0.184 H 25.1°. Best body text is #FFFFFF at 6.73:1 contrast (WCAG AA passes).

Color values

HEX	#B31D25
RGB	rgb(179, 29, 37)
HSL	hsl(357, 72%, 41%)
HSV	hsv(357, 84%, 70%)
CMYK	cmyk(0%, 83.8%, 79.3%, 29.8%)
CIE-LAB	lab(38.90, 57.59, 35.79)
CIE-LCH	lch(38.90, 67.81, 31.85°)
OKLab	oklab(49.56% 0.1662 0.0779)
OKLCH	oklch(49.56% 0.184 25.1)
XYZ	xyz(19.3661, 10.5992, 2.7761)
Luminance	0.1060 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31D25 #1DB3AB

analogous

#B31D70 #B31D25 #B3601D

triadic

#B31D25 #25B31D #1D25B3

tetradic

#B31D25 #70B31D #1DB3AB #601DB3

square

#B31D25 #70B31D #1DB3AB #601DB3

split-complementary

#B31D25 #1DB360 #1D70B3

monochromatic

#4A0C0F #7E141A #B31D25 #DD3039 #E6646B

Accessibility & contrast

On white

6.73

#B31D25 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#B31D25 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31D25

6.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31D25	#FFFFFF	#000000	##FFFFFF
##B31D25	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)

#4F4723

Deuteranopia (green-blind)

#73671E

Tritanopia (blue-blind)

#C60022

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31d25;
/* rgb */ color: rgb(179, 29, 37);
/* oklch */ color: oklch(49.6% 0.184 25.1);

Tailwind

colors: {
  custom: {
    50: '#d36a60',
    500: '#b31d25',
    950: '#000000',
  },
}

SCSS

$custom: #b31d25;
$custom-light: #d36a60;
$custom-dark: #000000;

JSON

{
  "hex": "#b31d25",
  "rgb": {
    "r": 179,
    "g": 29,
    "b": 37
  },
  "hsl": {
    "h": 356.8,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.49559,
    "c": 0.18353,
    "h": 25.1
  },
  "luminance": 0.10596
}

Semantic roles & 50–950 ramp

primary

#B31D25

secondary

#61CBC5

accent

#EFE539

background

#FEF6F5

surface

#FCECE9

border

#D5C7C5

text

#160705

muted

#847A79

Preview Lab

Preview with #B31D25

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

Preview Lab → · Contrast checker → · Palette generator →