#8F6696

CSS

:root {
  --sunshone-plum: #8f6696;
  --sunshone-plum-rgb: 143 102 150;
  --sunshone-plum-oklch: oklch(0.57 0.086 321.5);
}

.element {
  color: var(--sunshone-plum);
  background-color: hsl(291 19% 49%);
  border-color: oklch(0.57 0.086 321.5);
}

Tailwind CSS v4

@theme {
  --color-sunshone-plum: #8f6696;
  --color-sunshone-plum-50: #ffedff;
  --color-sunshone-plum-100: #f7dff9;
  --color-sunshone-plum-200: #e7c8ea;
  --color-sunshone-plum-300: #cea9d1;
  --color-sunshone-plum-400: #b68ebd;
  --color-sunshone-plum-500: #a173a9;
  --color-sunshone-plum-600: #88618e;
  --color-sunshone-plum-700: #6d4e72;
  --color-sunshone-plum-800: #4f3855;
  --color-sunshone-plum-900: #37273b;
  --color-sunshone-plum-950: #221525;
}

SCSS

$sunshone-plum: #8f6696;
$sunshone-plum-rgb: 143, 102, 150;
$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);
}