#976791

CSS

:root {
  --sunshone-plum: #976791;
  --sunshone-plum-rgb: 151 103 145;
  --sunshone-plum-oklch: oklch(0.578 0.085 331);
}

.element {
  color: var(--sunshone-plum);
  background-color: hsl(308 19% 50%);
  border-color: oklch(0.578 0.085 331);
}

Tailwind CSS v4

@theme {
  --color-sunshone-plum: #976791;
  --color-sunshone-plum-50: #ffedff;
  --color-sunshone-plum-100: #fadef4;
  --color-sunshone-plum-200: #ebc7e4;
  --color-sunshone-plum-300: #d3a8ca;
  --color-sunshone-plum-400: #bc8cb6;
  --color-sunshone-plum-500: #a771a0;
  --color-sunshone-plum-600: #8d6087;
  --color-sunshone-plum-700: #714d6c;
  --color-sunshone-plum-800: #533851;
  --color-sunshone-plum-900: #3a2638;
  --color-sunshone-plum-950: #241423;
}

SCSS

$sunshone-plum: #976791;
$sunshone-plum-rgb: 151, 103, 145;
$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);
}