#5D63C1

CSS

:root {
  --savoy-blue: #5d63c1;
  --savoy-blue-rgb: 93 99 193;
  --savoy-blue-oklch: oklch(0.542 0.144 277.7);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(236 45% 56%);
  border-color: oklch(0.542 0.144 277.7);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5d63c1;
  --color-savoy-blue-50: #ecf2ff;
  --color-savoy-blue-100: #dde4ff;
  --color-savoy-blue-200: #c7ceff;
  --color-savoy-blue-300: #a8afff;
  --color-savoy-blue-400: #8b94f2;
  --color-savoy-blue-500: #7179e3;
  --color-savoy-blue-600: #6067c0;
  --color-savoy-blue-700: #4c529a;
  --color-savoy-blue-800: #353c73;
  --color-savoy-blue-900: #242951;
  --color-savoy-blue-950: #131736;
}

SCSS

$savoy-blue: #5d63c1;
$savoy-blue-rgb: 93, 99, 193;
$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);
}