#5A61CA

CSS

:root {
  --savoy-blue: #5a61ca;
  --savoy-blue-rgb: 90 97 202;
  --savoy-blue-oklch: oklch(0.542 0.16 276.8);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(236 51% 57%);
  border-color: oklch(0.542 0.16 276.8);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5a61ca;
  --color-savoy-blue-50: #eaf1ff;
  --color-savoy-blue-100: #dbe3ff;
  --color-savoy-blue-200: #c5ceff;
  --color-savoy-blue-300: #a6aeff;
  --color-savoy-blue-400: #8793fb;
  --color-savoy-blue-500: #6e77ee;
  --color-savoy-blue-600: #5d65c8;
  --color-savoy-blue-700: #4a51a1;
  --color-savoy-blue-800: #333b79;
  --color-savoy-blue-900: #232955;
  --color-savoy-blue-950: #121639;
}

SCSS

$savoy-blue: #5a61ca;
$savoy-blue-rgb: 90, 97, 202;
$savoy-blue-light: mix(#fff, $savoy-blue, 20%);
$savoy-blue-dark: mix(#000, $savoy-blue, 20%);

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