#D5C5F3

CSS

:root {
  --york-plum: #d5c5f3;
  --york-plum-rgb: 213 197 243;
  --york-plum-oklch: oklch(0.851 0.065 300.9);
}

.element {
  color: var(--york-plum);
  background-color: hsl(261 66% 86%);
  border-color: oklch(0.851 0.065 300.9);
}

Tailwind CSS v4

@theme {
  --color-york-plum: #d5c5f3;
  --color-york-plum-50: #f9f1ff;
  --color-york-plum-100: #ece3fa;
  --color-york-plum-200: #d9ceec;
  --color-york-plum-300: #beb0d4;
  --color-york-plum-400: #a596c0;
  --color-york-plum-500: #8d7cab;
  --color-york-plum-600: #776991;
  --color-york-plum-700: #605474;
  --color-york-plum-800: #453d56;
  --color-york-plum-900: #302a3c;
  --color-york-plum-950: #1c1826;
}

SCSS

$york-plum: #d5c5f3;
$york-plum-rgb: 213, 197, 243;
$york-plum-light: mix(#fff, $york-plum, 20%);
$york-plum-dark: mix(#000, $york-plum, 20%);

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