#5F60CA

CSS

:root {
  --savoy-blue: #5f60ca;
  --savoy-blue-rgb: 95 96 202;
  --savoy-blue-oklch: oklch(0.544 0.161 279.2);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(239 50% 58%);
  border-color: oklch(0.544 0.161 279.2);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5f60ca;
  --color-savoy-blue-50: #ecf1ff;
  --color-savoy-blue-100: #dee2ff;
  --color-savoy-blue-200: #c8cdff;
  --color-savoy-blue-300: #a9adff;
  --color-savoy-blue-400: #8c92fb;
  --color-savoy-blue-500: #7375ed;
  --color-savoy-blue-600: #6163c8;
  --color-savoy-blue-700: #4d4fa1;
  --color-savoy-blue-800: #363a78;
  --color-savoy-blue-900: #252855;
  --color-savoy-blue-950: #141539;
}

SCSS

$savoy-blue: #5f60ca;
$savoy-blue-rgb: 95, 96, 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);
}