make SelectionColor transparent in mx:datagrid
===

I am using a mx:DataGrid component in my flex application. I showing a grid like this:

![enter image description here][1]

I want to change the selected Blue color to transparent. I am using following code:

    <mx:DataGrid id="dg" dataProvider="{arrDg}" width="100%" height="100%" 
        draggableColumns="false" rowCount="{arrDg.length}" click="dgClickHandler(event)" 
        variableRowHeight="true" resizableColumns="false" sortableColumns="false" 
        selectionColor="#00000000" verticalScrollPolicy="off">

But this is changing the color to black instead of transparent.

Please help.

  [1]: http://i.stack.imgur.com/NSuhJ.png
