#5861CE

CSS

:root {
  --savoy-blue: #5861ce;
  --savoy-blue-rgb: 88 97 206;
  --savoy-blue-oklch: oklch(0.543 0.166 275.8);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(235 55% 58%);
  border-color: oklch(0.543 0.166 275.8);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5861ce;
  --color-savoy-blue-50: #e9f1ff;
  --color-savoy-blue-100: #dae3ff;
  --color-savoy-blue-200: #c3ceff;
  --color-savoy-blue-300: #a3aeff;
  --color-savoy-blue-400: #8593ff;
  --color-savoy-blue-500: #6b76f2;
  --color-savoy-blue-600: #5b64cc;
  --color-savoy-blue-700: #4850a4;
  --color-savoy-blue-800: #323b7b;
  --color-savoy-blue-900: #222957;
  --color-savoy-blue-950: #11163b;
}

SCSS

$savoy-blue: #5861ce;
$savoy-blue-rgb: 88, 97, 206;
$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);
}