#395BD3

CSS

:root {
  --savoy-blue: #395bd3;
  --savoy-blue-rgb: 57 91 211;
  --savoy-blue-oklch: oklch(0.518 0.189 267.3);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(227 64% 53%);
  border-color: oklch(0.518 0.189 267.3);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #395bd3;
  --color-savoy-blue-50: #dff4ff;
  --color-savoy-blue-100: #cee6ff;
  --color-savoy-blue-200: #b4d1ff;
  --color-savoy-blue-300: #91b1ff;
  --color-savoy-blue-400: #6d96ff;
  --color-savoy-blue-500: #4f79ff;
  --color-savoy-blue-600: #4367d9;
  --color-savoy-blue-700: #3552ae;
  --color-savoy-blue-800: #223c83;
  --color-savoy-blue-900: #162a5c;
  --color-savoy-blue-950: #08163f;
}

SCSS

$savoy-blue: #395bd3;
$savoy-blue-rgb: 57, 91, 211;
$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);
}