#2D0337

CSS

:root {
  --dark-purple: #2d0337;
  --dark-purple-rgb: 45 3 55;
  --dark-purple-oklch: oklch(0.221 0.099 318.9);
}

.element {
  color: var(--dark-purple);
  background-color: hsl(288 90% 11%);
  border-color: oklch(0.221 0.099 318.9);
}

Tailwind CSS v4

@theme {
  --color-dark-purple: #2d0337;
  --color-dark-purple-50: #ffecff;
  --color-dark-purple-100: #f8defd;
  --color-dark-purple-200: #e8c7ef;
  --color-dark-purple-300: #cfa7d7;
  --color-dark-purple-400: #b88cc4;
  --color-dark-purple-500: #a270b0;
  --color-dark-purple-600: #895f95;
  --color-dark-purple-700: #6e4c77;
  --color-dark-purple-800: #503759;
  --color-dark-purple-900: #38263e;
  --color-dark-purple-950: #221427;
}

SCSS

$dark-purple: #2d0337;
$dark-purple-rgb: 45, 3, 55;
$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);
}