#7B6487

CSS

:root {
  --sunshone-plum: #7b6487;
  --sunshone-plum-rgb: 123 100 135;
  --sunshone-plum-oklch: oklch(0.538 0.06 313.9);
}

.element {
  color: var(--sunshone-plum);
  background-color: hsl(279 15% 46%);
  border-color: oklch(0.538 0.06 313.9);
}

Tailwind CSS v4

@theme {
  --color-sunshone-plum: #7b6487;
  --color-sunshone-plum-50: #fcf0ff;
  --color-sunshone-plum-100: #f0e2f6;
  --color-sunshone-plum-200: #dfcde6;
  --color-sunshone-plum-300: #c4afcd;
  --color-sunshone-plum-400: #ab94b8;
  --color-sunshone-plum-500: #957ba2;
  --color-sunshone-plum-600: #7e6889;
  --color-sunshone-plum-700: #65536e;
  --color-sunshone-plum-800: #493c52;
  --color-sunshone-plum-900: #332a39;
  --color-sunshone-plum-950: #1f1723;
}

SCSS

$sunshone-plum: #7b6487;
$sunshone-plum-rgb: 123, 100, 135;
$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);
}