#2E003B

CSS

:root {
  --dark-purple: #2e003b;
  --dark-purple-rgb: 46 0 59;
  --dark-purple-oklch: oklch(0.223 0.108 317.2);
}

.element {
  color: var(--dark-purple);
  background-color: hsl(287 100% 12%);
  border-color: oklch(0.223 0.108 317.2);
}

Tailwind CSS v4

@theme {
  --color-dark-purple: #2e003b;
  --color-dark-purple-50: #ffecff;
  --color-dark-purple-100: #f8ddff;
  --color-dark-purple-200: #e9c6f2;
  --color-dark-purple-300: #d0a6db;
  --color-dark-purple-400: #b98ac9;
  --color-dark-purple-500: #a36eb5;
  --color-dark-purple-600: #8a5d99;
  --color-dark-purple-700: #6e4b7b;
  --color-dark-purple-800: #51365c;
  --color-dark-purple-900: #382540;
  --color-dark-purple-950: #231329;
}

SCSS

$dark-purple: #2e003b;
$dark-purple-rgb: 46, 0, 59;
$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);
}