#5C61C9

CSS

:root {
  --savoy-blue: #5c61c9;
  --savoy-blue-rgb: 92 97 201;
  --savoy-blue-oklch: oklch(0.543 0.158 277.6);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(237 50% 57%);
  border-color: oklch(0.543 0.158 277.6);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5c61c9;
  --color-savoy-blue-50: #ebf1ff;
  --color-savoy-blue-100: #dce3ff;
  --color-savoy-blue-200: #c6cdff;
  --color-savoy-blue-300: #a7aeff;
  --color-savoy-blue-400: #8993fa;
  --color-savoy-blue-500: #7076ec;
  --color-savoy-blue-600: #5f65c7;
  --color-savoy-blue-700: #4b50a0;
  --color-savoy-blue-800: #343b78;
  --color-savoy-blue-900: #242955;
  --color-savoy-blue-950: #131639;
}

SCSS

$savoy-blue: #5c61c9;
$savoy-blue-rgb: 92, 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);
}