#310034

CSS

:root {
  --dark-purple: #310034;
  --dark-purple-rgb: 49 0 52;
  --dark-purple-oklch: oklch(0.222 0.104 325.7);
}

.element {
  color: var(--dark-purple);
  background-color: hsl(297 100% 10%);
  border-color: oklch(0.222 0.104 325.7);
}

Tailwind CSS v4

@theme {
  --color-dark-purple: #310034;
  --color-dark-purple-50: #ffebff;
  --color-dark-purple-100: #fcdcfa;
  --color-dark-purple-200: #edc5eb;
  --color-dark-purple-300: #d5a5d3;
  --color-dark-purple-400: #be89c0;
  --color-dark-purple-500: #a96dab;
  --color-dark-purple-600: #8f5c91;
  --color-dark-purple-700: #734a74;
  --color-dark-purple-800: #543557;
  --color-dark-purple-900: #3a243d;
  --color-dark-purple-950: #241326;
}

SCSS

$dark-purple: #310034;
$dark-purple-rgb: 49, 0, 52;
$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);
}