#BD7FF3

CSS

:root {
  --illicit-purple: #bd7ff3;
  --illicit-purple-rgb: 189 127 243;
  --illicit-purple-oklch: oklch(0.706 0.173 307.2);
}

.element {
  color: var(--illicit-purple);
  background-color: hsl(272 83% 73%);
  border-color: oklch(0.706 0.173 307.2);
}

Tailwind CSS v4

@theme {
  --color-illicit-purple: #bd7ff3;
  --color-illicit-purple-50: #ffe8ff;
  --color-illicit-purple-100: #f9d9ff;
  --color-illicit-purple-200: #eac0ff;
  --color-illicit-purple-300: #d19efa;
  --color-illicit-purple-400: #ba7fed;
  --color-illicit-purple-500: #a55fdd;
  --color-illicit-purple-600: #8b51bb;
  --color-illicit-purple-700: #704196;
  --color-illicit-purple-800: #512f71;
  --color-illicit-purple-900: #382050;
  --color-illicit-purple-950: #230f35;
}

SCSS

$illicit-purple: #bd7ff3;
$illicit-purple-rgb: 189, 127, 243;
$illicit-purple-light: mix(#fff, $illicit-purple, 20%);
$illicit-purple-dark: mix(#000, $illicit-purple, 20%);

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