#2F0039

CSS

:root {
  --dark-purple: #2f0039;
  --dark-purple-rgb: 47 0 57;
  --dark-purple-oklch: oklch(0.223 0.107 319.7);
}

.element {
  color: var(--dark-purple);
  background-color: hsl(289 100% 11%);
  border-color: oklch(0.223 0.107 319.7);
}

Tailwind CSS v4

@theme {
  --color-dark-purple: #2f0039;
  --color-dark-purple-50: #ffecff;
  --color-dark-purple-100: #f9ddfe;
  --color-dark-purple-200: #eac6f0;
  --color-dark-purple-300: #d1a6d8;
  --color-dark-purple-400: #ba8ac6;
  --color-dark-purple-500: #a56eb2;
  --color-dark-purple-600: #8b5d97;
  --color-dark-purple-700: #704a79;
  --color-dark-purple-800: #52365a;
  --color-dark-purple-900: #39253f;
  --color-dark-purple-950: #231328;
}

SCSS

$dark-purple: #2f0039;
$dark-purple-rgb: 47, 0, 57;
$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);
}