Panel Transparency
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="horizontal"> <mx:Panel title="borderAlpha=0" width="200" borderAlpha="0"> <mx:Label text="Label 1"/> <mx:Label text="Label 2"/> <mx:Label text="Label 3"/> </mx:Panel> <mx:Panel title="borderAlpha=.4" width="200" borderAlpha=".4"> <mx:Label text="Label 1"/> <mx:Label text="Label 2"/> <mx:Label text="Label 3"/> </mx:Panel> <mx:Panel title="borderAlpha=1" width="200" borderAlpha="1"> <mx:Label text="Label 1"/> <mx:Label text="Label 2"/> <mx:Label text="Label 3"/> </mx:Panel> </mx:Application>