#300035

CSS

:root {
  --dark-purple: #300035;
  --dark-purple-rgb: 48 0 53;
  --dark-purple-oklch: oklch(0.221 0.104 323.9);
}

.element {
  color: var(--dark-purple);
  background-color: hsl(294 100% 10%);
  border-color: oklch(0.221 0.104 323.9);
}

Tailwind CSS v4

@theme {
  --color-dark-purple: #300035;
  --color-dark-purple-50: #ffebff;
  --color-dark-purple-100: #fbddfb;
  --color-dark-purple-200: #ecc5ec;
  --color-dark-purple-300: #d4a5d4;
  --color-dark-purple-400: #bd89c1;
  --color-dark-purple-500: #a86dad;
  --color-dark-purple-600: #8e5d92;
  --color-dark-purple-700: #724a75;
  --color-dark-purple-800: #533658;
  --color-dark-purple-900: #3a253d;
  --color-dark-purple-950: #241327;
}

SCSS

$dark-purple: #300035;
$dark-purple-rgb: 48, 0, 53;
$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);
}