Change the color of check boxes

lib/main.dart

@@ -85,6 +85,7 @@ class MyApp extends StatelessWidget with WidgetsBindingObserver {
         hintColor: Colors.grey,
         accentColor: Colors.pink[400],
         buttonColor: Colors.pink,
+        toggleableActiveColor: Colors.pink[400],
       ),
       home: HomeWidget(_title),
     );