#4860DD

CSS

:root {
  --savoy-blue: #4860dd;
  --savoy-blue-rgb: 72 96 221;
  --savoy-blue-oklch: oklch(0.543 0.192 270.5);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(230 69% 57%);
  border-color: oklch(0.543 0.192 270.5);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #4860dd;
  --color-savoy-blue-50: #e2f3ff;
  --color-savoy-blue-100: #d2e5ff;
  --color-savoy-blue-200: #b8cfff;
  --color-savoy-blue-300: #96afff;
  --color-savoy-blue-400: #7593ff;
  --color-savoy-blue-500: #5975ff;
  --color-savoy-blue-600: #4b64da;
  --color-savoy-blue-700: #3c50af;
  --color-savoy-blue-800: #273b84;
  --color-savoy-blue-900: #1a295d;
  --color-savoy-blue-950: #0b1540;
}

SCSS

$savoy-blue: #4860dd;
$savoy-blue-rgb: 72, 96, 221;
$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);
}