#A3373B#A3373B

#A3373B is a mid, vivid red. Relative luminance 0.108; OKLCH L 49.4% C 0.143 H 21.9°. Best body text is #FFFFFF at 6.63:1 contrast (WCAG AA passes).

Color values

HEX	#A3373B
RGB	rgb(163, 55, 59)
HSL	hsl(358, 50%, 43%)
HSV	hsv(358, 66%, 64%)
CMYK	cmyk(0%, 66.3%, 63.8%, 36.1%)
CIE-LAB	lab(39.30, 44.77, 22.24)
CIE-LCH	lch(39.30, 49.99, 26.42°)
OKLab	oklab(49.41% 0.1323 0.0533)
OKLCH	oklch(49.41% 0.143 21.9)
XYZ	xyz(17.2616, 10.8371, 5.3196)
Luminance	0.1084 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A3373B #37A39F

analogous

#A33771 #A3373B #A36937

triadic

#A3373B #3BA337 #373BA3

tetradic

#A3373B #71A337 #37A39F #6937A3

square

#A3373B #71A337 #37A39F #6937A3

split-complementary

#A3373B #37A369 #3771A3

monochromatic

#47181A #75282A #A3373B #C55257 #D48083

Accessibility & contrast

On white

6.63

#A3373B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#A3373B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A3373B

6.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A3373B	#FFFFFF	#000000	##FFFFFF
##A3373B	1.00	6.63	3.17	6.63
#FFFFFF	6.63	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#534E3A

Deuteranopia (green-blind)

#6F6538

Tritanopia (blue-blind)

#B31E39

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #a3373b;
/* rgb */ color: rgb(163, 55, 59);
/* oklch */ color: oklch(49.4% 0.143 21.9);

Tailwind

colors: {
  custom: {
    50: '#c57471',
    500: '#a3373b',
    950: '#000000',
  },
}

SCSS

$custom: #a3373b;
$custom-light: #c57471;
$custom-dark: #000000;

JSON

{
  "hex": "#a3373b",
  "rgb": {
    "r": 163,
    "g": 55,
    "b": 59
  },
  "hsl": {
    "h": 357.778,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.49405,
    "c": 0.14261,
    "h": 21.9
  },
  "luminance": 0.10835
}

Semantic roles & 50–950 ramp

primary

#A3373B

secondary

#78BEBB

accent

#D9D44F

background

#FCF7F6

surface

#F9EDEC

border

#D2C8C7

text

#140907

muted

#827B7A

Preview Lab

Preview with #A3373B

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

Preview Lab → · Contrast checker → · Palette generator →