fix

Assets/UIWidgets/Tests/Widgets.cs

                 width: 200,
                 height: 200,
                 margin: EdgeInsets.all(30.0),
+                padding: EdgeInsets.all(15.0),
+                color: ui.Color.fromARGB(255, 244, 190, 85),
                 child: image
             );
         }

Assets/UIWidgets/widgets/container.cs

-using System;
-using System.Collections.Generic;
-using UnityEngine;
-using Color = UIWidgets.ui.Color;
 
 namespace UIWidgets.widgets {
     public class DecoratedBox : SingleChildRenderObjectWidget {
             Key key = null,
             Alignment alignment = null,
             EdgeInsets padding = null,
-            Color color = null,
+            ui.Color color = null,
             Decoration decoration = null,
             Decoration forgroundDecoration = null,
             double width = 0.0,