#5865BE

CSS

:root {
  --savoy-blue: #5865be;
  --savoy-blue-rgb: 88 101 190;
  --savoy-blue-oklch: oklch(0.54 0.139 274.6);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(232 44% 55%);
  border-color: oklch(0.54 0.139 274.6);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5865be;
  --color-savoy-blue-50: #eaf3ff;
  --color-savoy-blue-100: #dbe5ff;
  --color-savoy-blue-200: #c4d0ff;
  --color-savoy-blue-300: #a5b1fe;
  --color-savoy-blue-400: #8697f0;
  --color-savoy-blue-500: #6c7be1;
  --color-savoy-blue-600: #5c69bd;
  --color-savoy-blue-700: #495498;
  --color-savoy-blue-800: #333e72;
  --color-savoy-blue-900: #222a50;
  --color-savoy-blue-950: #121736;
}

SCSS

$savoy-blue: #5865be;
$savoy-blue-rgb: 88, 101, 190;
$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);
}