#4863D4

CSS

:root {
  --savoy-blue: #4863d4;
  --savoy-blue-rgb: 72 99 212;
  --savoy-blue-oklch: oklch(0.542 0.176 269.5);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(228 62% 56%);
  border-color: oklch(0.542 0.176 269.5);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #4863d4;
  --color-savoy-blue-50: #e3f3ff;
  --color-savoy-blue-100: #d2e5ff;
  --color-savoy-blue-200: #b9d0ff;
  --color-savoy-blue-300: #97b1ff;
  --color-savoy-blue-400: #7696ff;
  --color-savoy-blue-500: #5979f9;
  --color-savoy-blue-600: #4c67d2;
  --color-savoy-blue-700: #3c52a9;
  --color-savoy-blue-800: #283d7e;
  --color-savoy-blue-900: #1a2a59;
  --color-savoy-blue-950: #0c173d;
}

SCSS

$savoy-blue: #4863d4;
$savoy-blue-rgb: 72, 99, 212;
$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);
}