#A3373D#A3373D

#A3373D is a mid, vivid red. Relative luminance 0.109; OKLCH L 49.4% C 0.142 H 20.9°. Best body text is #FFFFFF at 6.62:1 contrast (WCAG AA passes).

Color values

HEX	#A3373D
RGB	rgb(163, 55, 61)
HSL	hsl(357, 50%, 43%)
HSV	hsv(357, 66%, 64%)
CMYK	cmyk(0%, 66.3%, 62.6%, 36.1%)
CIE-LAB	lab(39.34, 44.90, 21.05)
CIE-LCH	lch(39.34, 49.59, 25.11°)
OKLab	oklab(49.44% 0.1331 0.0508)
OKLCH	oklch(49.44% 0.142 20.9)
XYZ	xyz(17.3144, 10.8582, 5.5981)
Luminance	0.1086 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A3373D #37A39D

analogous

#A33773 #A3373D #A36737

triadic

#A3373D #3DA337 #373DA3

tetradic

#A3373D #73A337 #37A39D #6737A3

square

#A3373D #73A337 #37A39D #6737A3

split-complementary

#A3373D #37A367 #3773A3

monochromatic

#47181B #75282C #A3373D #C55259 #D48085

Accessibility & contrast

On white

6.62

#A3373D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#A3373D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A3373D

6.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A3373D	#FFFFFF	#000000	##FFFFFF
##A3373D	1.00	6.62	3.17	6.62
#FFFFFF	6.62	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#534E3C

Deuteranopia (green-blind)

#6E653A

Tritanopia (blue-blind)

#B31F3A

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #a3373d;
/* rgb */ color: rgb(163, 55, 61);
/* oklch */ color: oklch(49.4% 0.142 20.9);

Tailwind

colors: {
  custom: {
    50: '#c47472',
    500: '#a3373d',
    950: '#000000',
  },
}

SCSS

$custom: #a3373d;
$custom-light: #c47472;
$custom-dark: #000000;

JSON

{
  "hex": "#a3373d",
  "rgb": {
    "r": 163,
    "g": 55,
    "b": 61
  },
  "hsl": {
    "h": 356.667,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.49443,
    "c": 0.14245,
    "h": 20.9
  },
  "luminance": 0.10856
}

Semantic roles & 50–950 ramp

primary

#A3373D

secondary

#78BEBA

accent

#D9D14F

background

#FCF7F6

surface

#F9EDEC

border

#D2C8C7

text

#140908

muted

#827B7B

Preview Lab

Preview with #A3373D

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

Preview Lab → · Contrast checker → · Palette generator →