#5261D2

CSS

:root {
  --savoy-blue: #5261d2;
  --savoy-blue-rgb: 82 97 210;
  --savoy-blue-oklch: oklch(0.542 0.173 273.5);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(233 59% 57%);
  border-color: oklch(0.542 0.173 273.5);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5261d2;
  --color-savoy-blue-50: #e7f2ff;
  --color-savoy-blue-100: #d7e4ff;
  --color-savoy-blue-200: #bfceff;
  --color-savoy-blue-300: #9fafff;
  --color-savoy-blue-400: #7f94ff;
  --color-savoy-blue-500: #6476f7;
  --color-savoy-blue-600: #5565d0;
  --color-savoy-blue-700: #4451a7;
  --color-savoy-blue-800: #2e3b7d;
  --color-savoy-blue-900: #1f2959;
  --color-savoy-blue-950: #0f163c;
}

SCSS

$savoy-blue: #5261d2;
$savoy-blue-rgb: 82, 97, 210;
$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);
}