#5B62C6

CSS

:root {
  --savoy-blue: #5b62c6;
  --savoy-blue-rgb: 91 98 198;
  --savoy-blue-oklch: oklch(0.542 0.153 277);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(236 48% 57%);
  border-color: oklch(0.542 0.153 277);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5b62c6;
  --color-savoy-blue-50: #ebf2ff;
  --color-savoy-blue-100: #dce3ff;
  --color-savoy-blue-200: #c6ceff;
  --color-savoy-blue-300: #a7afff;
  --color-savoy-blue-400: #8894f7;
  --color-savoy-blue-500: #6f78e9;
  --color-savoy-blue-600: #5e66c5;
  --color-savoy-blue-700: #4b519e;
  --color-savoy-blue-800: #343c76;
  --color-savoy-blue-900: #232954;
  --color-savoy-blue-950: #131638;
}

SCSS

$savoy-blue: #5b62c6;
$savoy-blue-rgb: 91, 98, 198;
$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);
}