#5E6BD3

CSS

:root {
  --savoy-blue: #5e6bd3;
  --savoy-blue-rgb: 94 107 211;
  --savoy-blue-oklch: oklch(0.57 0.159 274.9);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(233 57% 60%);
  border-color: oklch(0.57 0.159 274.9);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5e6bd3;
  --color-savoy-blue-50: #e9f2ff;
  --color-savoy-blue-100: #dae4ff;
  --color-savoy-blue-200: #c2cfff;
  --color-savoy-blue-300: #a3afff;
  --color-savoy-blue-400: #8494fb;
  --color-savoy-blue-500: #6a78ed;
  --color-savoy-blue-600: #5a66c8;
  --color-savoy-blue-700: #4752a1;
  --color-savoy-blue-800: #313c78;
  --color-savoy-blue-900: #212955;
  --color-savoy-blue-950: #111639;
}

SCSS

$savoy-blue: #5e6bd3;
$savoy-blue-rgb: 94, 107, 211;
$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);
}