#A591CB

CSS

:root {
  --petrified-purple: #a591cb;
  --petrified-purple-rgb: 165 145 203;
  --petrified-purple-oklch: oklch(0.695 0.086 300);
}

.element {
  color: var(--petrified-purple);
  background-color: hsl(261 36% 68%);
  border-color: oklch(0.695 0.086 300);
}

Tailwind CSS v4

@theme {
  --color-petrified-purple: #a591cb;
  --color-petrified-purple-50: #f9f0ff;
  --color-petrified-purple-100: #ede2ff;
  --color-petrified-purple-200: #dbccf4;
  --color-petrified-purple-300: #bfaddd;
  --color-petrified-purple-400: #a693ca;
  --color-petrified-purple-500: #8f79b7;
  --color-petrified-purple-600: #79669a;
  --color-petrified-purple-700: #61527c;
  --color-petrified-purple-800: #463c5c;
  --color-petrified-purple-900: #302941;
  --color-petrified-purple-950: #1d1729;
}

SCSS

$petrified-purple: #a591cb;
$petrified-purple-rgb: 165, 145, 203;
$petrified-purple-light: mix(#fff, $petrified-purple, 20%);
$petrified-purple-dark: mix(#000, $petrified-purple, 20%);

.element {
  color: $petrified-purple;
  box-shadow: 0 0 0 2px rgba($petrified-purple, 0.35);
}