#5D61C9

CSS

:root {
  --savoy-blue: #5d61c9;
  --savoy-blue-rgb: 93 97 201;
  --savoy-blue-oklch: oklch(0.543 0.158 278.1);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(238 50% 58%);
  border-color: oklch(0.543 0.158 278.1);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5d61c9;
  --color-savoy-blue-50: #ecf1ff;
  --color-savoy-blue-100: #dde3ff;
  --color-savoy-blue-200: #c7cdff;
  --color-savoy-blue-300: #a8aeff;
  --color-savoy-blue-400: #8a93fa;
  --color-savoy-blue-500: #7176ec;
  --color-savoy-blue-600: #5f64c7;
  --color-savoy-blue-700: #4c50a0;
  --color-savoy-blue-800: #353b78;
  --color-savoy-blue-900: #242855;
  --color-savoy-blue-950: #131639;
}

SCSS

$savoy-blue: #5d61c9;
$savoy-blue-rgb: 93, 97, 201;
$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);
}