#A3373A#A3373A

#A3373A is a mid, vivid red. Relative luminance 0.108; OKLCH L 49.4% C 0.143 H 22.5°. Best body text is #FFFFFF at 6.64:1 contrast (WCAG AA passes).

Color values

HEX	#A3373A
RGB	rgb(163, 55, 58)
HSL	hsl(358, 50%, 43%)
HSV	hsv(358, 66%, 64%)
CMYK	cmyk(0%, 66.3%, 64.4%, 36.1%)
CIE-LAB	lab(39.29, 44.70, 22.83)
CIE-LCH	lch(39.29, 50.20, 27.06°)
OKLab	oklab(49.39% 0.1319 0.0545)
OKLCH	oklch(49.39% 0.143 22.5)
XYZ	xyz(17.2359, 10.8268, 5.1843)
Luminance	0.1082 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A3373A #37A3A0

analogous

#A33770 #A3373A #A36A37

triadic

#A3373A #3AA337 #373AA3

tetradic

#A3373A #70A337 #37A3A0 #6A37A3

square

#A3373A #70A337 #37A3A0 #6A37A3

split-complementary

#A3373A #37A36A #3770A3

monochromatic

#471819 #75282A #A3373A #C55256 #D48083

Accessibility & contrast

On white

6.64

#A3373A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#A3373A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A3373A

6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A3373A	#FFFFFF	#000000	##FFFFFF
##A3373A	1.00	6.64	3.16	6.64
#FFFFFF	6.64	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#534E39

Deuteranopia (green-blind)

#6F6537

Tritanopia (blue-blind)

#B31E39

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #a3373a;
/* rgb */ color: rgb(163, 55, 58);
/* oklch */ color: oklch(49.4% 0.143 22.5);

Tailwind

colors: {
  custom: {
    50: '#c57470',
    500: '#a3373a',
    950: '#000000',
  },
}

SCSS

$custom: #a3373a;
$custom-light: #c57470;
$custom-dark: #000000;

JSON

{
  "hex": "#a3373a",
  "rgb": {
    "r": 163,
    "g": 55,
    "b": 58
  },
  "hsl": {
    "h": 358.333,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.49386,
    "c": 0.14271,
    "h": 22.5
  },
  "luminance": 0.10824
}

Semantic roles & 50–950 ramp

primary

#A3373A

secondary

#78BEBC

accent

#D9D54F

background

#FCF7F6

surface

#F9EDEC

border

#D2C8C7

text

#140807

muted

#827B7A

Preview Lab

Preview with #A3373A

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

Preview Lab → · Contrast checker → · Palette generator →