#4A64CE

CSS

:root {
  --savoy-blue: #4a64ce;
  --savoy-blue-rgb: 74 100 206;
  --savoy-blue-oklch: oklch(0.541 0.166 269.7);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(228 57% 55%);
  border-color: oklch(0.541 0.166 269.7);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #4a64ce;
  --color-savoy-blue-50: #e4f3ff;
  --color-savoy-blue-100: #d4e5ff;
  --color-savoy-blue-200: #bbd0ff;
  --color-savoy-blue-300: #99b1ff;
  --color-savoy-blue-400: #7897ff;
  --color-savoy-blue-500: #5c7af3;
  --color-savoy-blue-600: #4e68cd;
  --color-savoy-blue-700: #3e53a5;
  --color-savoy-blue-800: #293d7b;
  --color-savoy-blue-900: #1c2a57;
  --color-savoy-blue-950: #0c173b;
}

SCSS

$savoy-blue: #4a64ce;
$savoy-blue-rgb: 74, 100, 206;
$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);
}