#6460C5

CSS

:root {
  --savoy-blue: #6460c5;
  --savoy-blue-rgb: 100 96 197;
  --savoy-blue-oklch: oklch(0.544 0.153 281.8);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(242 47% 57%);
  border-color: oklch(0.544 0.153 281.8);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #6460c5;
  --color-savoy-blue-50: #eff0ff;
  --color-savoy-blue-100: #e1e2ff;
  --color-savoy-blue-200: #cbccff;
  --color-savoy-blue-300: #aeacff;
  --color-savoy-blue-400: #9191f6;
  --color-savoy-blue-500: #7875e7;
  --color-savoy-blue-600: #6663c3;
  --color-savoy-blue-700: #514f9d;
  --color-savoy-blue-800: #393a76;
  --color-savoy-blue-900: #272853;
  --color-savoy-blue-950: #161538;
}

SCSS

$savoy-blue: #6460c5;
$savoy-blue-rgb: 100, 96, 197;
$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);
}