#395CD6

CSS

:root {
  --savoy-blue: #395cd6;
  --savoy-blue-rgb: 57 92 214;
  --savoy-blue-oklch: oklch(0.522 0.192 267.2);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(227 66% 53%);
  border-color: oklch(0.522 0.192 267.2);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #395cd6;
  --color-savoy-blue-50: #dff4ff;
  --color-savoy-blue-100: #cee6ff;
  --color-savoy-blue-200: #b3d1ff;
  --color-savoy-blue-300: #90b1ff;
  --color-savoy-blue-400: #6c96ff;
  --color-savoy-blue-500: #4e78ff;
  --color-savoy-blue-600: #4266da;
  --color-savoy-blue-700: #3552b0;
  --color-savoy-blue-800: #213c84;
  --color-savoy-blue-900: #162a5d;
  --color-savoy-blue-950: #081640;
}

SCSS

$savoy-blue: #395cd6;
$savoy-blue-rgb: 57, 92, 214;
$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);
}