#8B6895

CSS

:root {
  --sunshone-plum: #8b6895;
  --sunshone-plum-rgb: 139 104 149;
  --sunshone-plum-oklch: oklch(0.569 0.079 318.6);
}

.element {
  color: var(--sunshone-plum);
  background-color: hsl(287 18% 50%);
  border-color: oklch(0.569 0.079 318.6);
}

Tailwind CSS v4

@theme {
  --color-sunshone-plum: #8b6895;
  --color-sunshone-plum-50: #ffeeff;
  --color-sunshone-plum-100: #f4e0f8;
  --color-sunshone-plum-200: #e4cae9;
  --color-sunshone-plum-300: #caabd1;
  --color-sunshone-plum-400: #b390bd;
  --color-sunshone-plum-500: #9d75a8;
  --color-sunshone-plum-600: #84638e;
  --color-sunshone-plum-700: #6a4f72;
  --color-sunshone-plum-800: #4d3a55;
  --color-sunshone-plum-900: #36283b;
  --color-sunshone-plum-950: #211625;
}

SCSS

$sunshone-plum: #8b6895;
$sunshone-plum-rgb: 139, 104, 149;
$sunshone-plum-light: mix(#fff, $sunshone-plum, 20%);
$sunshone-plum-dark: mix(#000, $sunshone-plum, 20%);

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