#AD3131#AD3131

#AD3131 is a mid, vivid red. Relative luminance 0.113; OKLCH L 50.3% C 0.161 H 25.1°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#AD3131
RGB	rgb(173, 49, 49)
HSL	hsl(0, 56%, 44%)
HSV	hsv(0, 72%, 68%)
CMYK	cmyk(0%, 71.7%, 71.7%, 32.2%)
CIE-LAB	lab(40.09, 50.01, 29.71)
CIE-LCH	lch(40.09, 58.17, 30.71°)
OKLab	oklab(50.28% 0.1456 0.0681)
OKLCH	oklch(50.28% 0.161 25.1)
XYZ	xyz(18.8884, 11.3054, 4.0927)
Luminance	0.1130 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AD3131 #31ADAD

analogous

#AD316F #AD3131 #AD6F31

triadic

#AD3131 #31AD31 #3131AD

tetradic

#AD3131 #6FAD31 #31ADAD #6F31AD

square

#AD3131 #6FAD31 #31ADAD #6F31AD

split-complementary

#AD3131 #31AD6F #316FAD

monochromatic

#4E1616 #7D2323 #AD3131 #CD4E4E #DA7E7E

Accessibility & contrast

On white

6.44

#AD3131 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#AD3131 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AD3131

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AD3131	#FFFFFF	#000000	##FFFFFF
##AD3131	1.00	6.44	3.26	6.44
#FFFFFF	6.44	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544D30

Deuteranopia (green-blind)

#73682D

Tritanopia (blue-blind)

#BE0133

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #ad3131;
/* rgb */ color: rgb(173, 49, 49);
/* oklch */ color: oklch(50.3% 0.161 25.1);

Tailwind

colors: {
  custom: {
    50: '#cd7269',
    500: '#ad3131',
    950: '#000000',
  },
}

SCSS

$custom: #ad3131;
$custom-light: #cd7269;
$custom-dark: #000000;

JSON

{
  "hex": "#ad3131",
  "rgb": {
    "r": 173,
    "g": 49,
    "b": 49
  },
  "hsl": {
    "h": 0,
    "s": 55.856,
    "l": 43.529
  },
  "oklch": {
    "l": 0.50282,
    "c": 0.16069,
    "h": 25.1
  },
  "luminance": 0.11303
}

Semantic roles & 50–950 ramp

primary

#AD3131

secondary

#77C3C3

accent

#DFDF49

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150806

muted

#837B7A

Preview Lab

Preview with #AD3131

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

Preview Lab → · Contrast checker → · Palette generator →