#5463CA

CSS

:root {
  --savoy-blue: #5463ca;
  --savoy-blue-rgb: 84 99 202;
  --savoy-blue-oklch: oklch(0.542 0.159 273.7);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(232 53% 56%);
  border-color: oklch(0.542 0.159 273.7);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5463ca;
  --color-savoy-blue-50: #e8f2ff;
  --color-savoy-blue-100: #d8e4ff;
  --color-savoy-blue-200: #c1cfff;
  --color-savoy-blue-300: #a1b0ff;
  --color-savoy-blue-400: #8195fb;
  --color-savoy-blue-500: #6779ee;
  --color-savoy-blue-600: #5767c8;
  --color-savoy-blue-700: #4552a1;
  --color-savoy-blue-800: #303c79;
  --color-savoy-blue-900: #202a55;
  --color-savoy-blue-950: #101739;
}

SCSS

$savoy-blue: #5463ca;
$savoy-blue-rgb: 84, 99, 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);
}