#2C0633

CSS

:root {
  --dark-purple: #2c0633;
  --dark-purple-rgb: 44 6 51;
  --dark-purple-oklch: oklch(0.22 0.09 320.9);
}

.element {
  color: var(--dark-purple);
  background-color: hsl(291 79% 11%);
  border-color: oklch(0.22 0.09 320.9);
}

Tailwind CSS v4

@theme {
  --color-dark-purple: #2c0633;
  --color-dark-purple-50: #ffedff;
  --color-dark-purple-100: #f7defa;
  --color-dark-purple-200: #e7c8eb;
  --color-dark-purple-300: #cea8d2;
  --color-dark-purple-400: #b78dbf;
  --color-dark-purple-500: #a172aa;
  --color-dark-purple-600: #886190;
  --color-dark-purple-700: #6d4d73;
  --color-dark-purple-800: #503856;
  --color-dark-purple-900: #37263c;
  --color-dark-purple-950: #221526;
}

SCSS

$dark-purple: #2c0633;
$dark-purple-rgb: 44, 6, 51;
$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);
}