use solid color to fill a Rect
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:s="library://ns.adobe.com/flex/spark"> <s:Group id="group"> <s:layout> <s:TileLayout orientation="columns" /> </s:layout> <s:Rect width="100" height="100"> <s:fill> <mx:SolidColor color="#DDDDDD" /> </s:fill> </s:Rect> <s:Ellipse> <s:fill> <mx:SolidColor color="#FF5500" /> </s:fill> </s:Ellipse> </s:Group> </mx:Application>