#320096

CSS

:root {
  --dramatic-blue: #320096;
  --dramatic-blue-rgb: 50 0 150;
  --dramatic-blue-oklch: oklch(0.332 0.199 281.8);
}

.element {
  color: var(--dramatic-blue);
  background-color: hsl(260 100% 29%);
  border-color: oklch(0.332 0.199 281.8);
}

Tailwind CSS v4

@theme {
  --color-dramatic-blue: #320096;
  --color-dramatic-blue-50: #edeeff;
  --color-dramatic-blue-100: #dfe0ff;
  --color-dramatic-blue-200: #c9c9ff;
  --color-dramatic-blue-300: #aca7ff;
  --color-dramatic-blue-400: #8f8aff;
  --color-dramatic-blue-500: #776aff;
  --color-dramatic-blue-600: #655bda;
  --color-dramatic-blue-700: #5048b0;
  --color-dramatic-blue-800: #383584;
  --color-dramatic-blue-900: #26245e;
  --color-dramatic-blue-950: #151240;
}

SCSS

$dramatic-blue: #320096;
$dramatic-blue-rgb: 50, 0, 150;
$dramatic-blue-light: mix(#fff, $dramatic-blue, 20%);
$dramatic-blue-dark: mix(#000, $dramatic-blue, 20%);

.element {
  color: $dramatic-blue;
  box-shadow: 0 0 0 2px rgba($dramatic-blue, 0.35);
}