#91678A

CSS

:root {
  --sunshone-plum: #91678a;
  --sunshone-plum-rgb: 145 103 138;
  --sunshone-plum-oklch: oklch(0.569 0.073 332.5);
}

.element {
  color: var(--sunshone-plum);
  background-color: hsl(310 17% 49%);
  border-color: oklch(0.569 0.073 332.5);
}

Tailwind CSS v4

@theme {
  --color-sunshone-plum: #91678a;
  --color-sunshone-plum-50: #ffeefe;
  --color-sunshone-plum-100: #f8dff2;
  --color-sunshone-plum-200: #e9c9e1;
  --color-sunshone-plum-300: #d0aac7;
  --color-sunshone-plum-400: #b98fb1;
  --color-sunshone-plum-500: #a3749b;
  --color-sunshone-plum-600: #8a6283;
  --color-sunshone-plum-700: #6f4f69;
  --color-sunshone-plum-800: #51394e;
  --color-sunshone-plum-900: #382736;
  --color-sunshone-plum-950: #231521;
}

SCSS

$sunshone-plum: #91678a;
$sunshone-plum-rgb: 145, 103, 138;
$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);
}