add support for network calculation from the calculator

lib/components/login/login.dart

@@ -192,7 +192,7 @@ class _LoginLogoState extends State<_LoginLogo> {
   }
 
   String _colorToHex(Color color) {
-    final hex = color.value.toRadixString(16).padLeft(8, '0');
+    final hex = color.toARGB32().toRadixString(16).padLeft(8, '0');
     return '#${hex.substring(2)}';
   }
 }