#4F64CB

CSS

:root {
  --savoy-blue: #4f64cb;
  --savoy-blue-rgb: 79 100 203;
  --savoy-blue-oklch: oklch(0.541 0.161 271.4);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(230 54% 55%);
  border-color: oklch(0.541 0.161 271.4);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #4f64cb;
  --color-savoy-blue-50: #e6f3ff;
  --color-savoy-blue-100: #d6e5ff;
  --color-savoy-blue-200: #bed0ff;
  --color-savoy-blue-300: #9db1ff;
  --color-savoy-blue-400: #7d96fd;
  --color-savoy-blue-500: #617aef;
  --color-savoy-blue-600: #5368c9;
  --color-savoy-blue-700: #4253a2;
  --color-savoy-blue-800: #2c3d79;
  --color-savoy-blue-900: #1e2a56;
  --color-savoy-blue-950: #0e173a;
}

SCSS

$savoy-blue: #4f64cb;
$savoy-blue-rgb: 79, 100, 203;
$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);
}