#300231

CSS

:root {
  --dark-purple: #300231;
  --dark-purple-rgb: 48 2 49;
  --dark-purple-oklch: oklch(0.221 0.097 327.3);
}

.element {
  color: var(--dark-purple);
  background-color: hsl(299 92% 10%);
  border-color: oklch(0.221 0.097 327.3);
}

Tailwind CSS v4

@theme {
  --color-dark-purple: #300231;
  --color-dark-purple-50: #ffecff;
  --color-dark-purple-100: #fbddf8;
  --color-dark-purple-200: #ecc6e9;
  --color-dark-purple-300: #d4a6d0;
  --color-dark-purple-400: #bd8abc;
  --color-dark-purple-500: #a86ea7;
  --color-dark-purple-600: #8e5e8d;
  --color-dark-purple-700: #724b71;
  --color-dark-purple-800: #533655;
  --color-dark-purple-900: #3a253b;
  --color-dark-purple-950: #241325;
}

SCSS

$dark-purple: #300231;
$dark-purple-rgb: 48, 2, 49;
$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);
}