#300330

CSS

:root {
  --dark-purple: #300330;
  --dark-purple-rgb: 48 3 48;
  --dark-purple-oklch: oklch(0.221 0.094 328.2);
}

.element {
  color: var(--dark-purple);
  background-color: hsl(300 88% 10%);
  border-color: oklch(0.221 0.094 328.2);
}

Tailwind CSS v4

@theme {
  --color-dark-purple: #300330;
  --color-dark-purple-50: #ffecff;
  --color-dark-purple-100: #fbddf7;
  --color-dark-purple-200: #ecc6e8;
  --color-dark-purple-300: #d4a6ce;
  --color-dark-purple-400: #bd8bbb;
  --color-dark-purple-500: #a86fa6;
  --color-dark-purple-600: #8e5e8c;
  --color-dark-purple-700: #724b70;
  --color-dark-purple-800: #533754;
  --color-dark-purple-900: #3a253a;
  --color-dark-purple-950: #241424;
}

SCSS

$dark-purple: #300330;
$dark-purple-rgb: 48, 3, 48;
$dark-purple-light: mix(#fff, $dark-purple, 20%);
$dark-purple-dark: mix(#000, $dark-purple, 20%);

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