#A3303A#A3303A

#A3303A is a mid, vivid red. Relative luminance 0.102; OKLCH L 48.6% C 0.150 H 20.0°. Best body text is #FFFFFF at 6.91:1 contrast (WCAG AA passes).

Color values

HEX	#A3303A
RGB	rgb(163, 48, 58)
HSL	hsl(355, 55%, 41%)
HSV	hsv(355, 71%, 64%)
CMYK	cmyk(0%, 70.6%, 64.4%, 36.1%)
CIE-LAB	lab(38.21, 47.63, 21.47)
CIE-LCH	lch(38.21, 52.24, 24.26°)
OKLab	oklab(48.58% 0.1412 0.0514)
OKLCH	oklch(48.58% 0.15 20)
XYZ	xyz(16.9267, 10.2083, 5.0813)
Luminance	0.1021 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A3303A #30A399

analogous

#A33074 #A3303A #A36030

triadic

#A3303A #3AA330 #303AA3

tetradic

#A3303A #74A330 #30A399 #6030A3

square

#A3303A #74A330 #30A399 #6030A3

split-complementary

#A3303A #30A360 #3074A3

monochromatic

#441418 #742229 #A3303A #C94753 #D7777F

Accessibility & contrast

On white

6.91

#A3303A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.04

#A3303A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A3303A

6.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A3303A	#FFFFFF	#000000	##FFFFFF
##A3303A	1.00	6.91	3.04	6.91
#FFFFFF	6.91	1.00	21.00	1.00
#000000	3.04	21.00	1.00	21.00
##FFFFFF	6.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F4A3A

Deuteranopia (green-blind)

#6C6337

Tritanopia (blue-blind)

#B31035

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #a3303a;
/* rgb */ color: rgb(163, 48, 58);
/* oklch */ color: oklch(48.6% 0.150 20.0);

Tailwind

colors: {
  custom: {
    50: '#c57070',
    500: '#a3303a',
    950: '#000000',
  },
}

SCSS

$custom: #a3303a;
$custom-light: #c57070;
$custom-dark: #000000;

JSON

{
  "hex": "#a3303a",
  "rgb": {
    "r": 163,
    "g": 48,
    "b": 58
  },
  "hsl": {
    "h": 354.783,
    "s": 54.502,
    "l": 41.373
  },
  "oklch": {
    "l": 0.48584,
    "c": 0.15025,
    "h": 20
  },
  "luminance": 0.10206
}

Semantic roles & 50–950 ramp

primary

#A3303A

secondary

#70BFB8

accent

#DED14A

background

#FDF7F6

surface

#FAEDEC

border

#D3C8C7

text

#140807

muted

#837B7A

Preview Lab

Preview with #A3303A

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

Preview Lab → · Contrast checker → · Palette generator →