Hi Heather,
To style this component, you'll want to make adjustments to the respective classes in your skin's CSS.
In particular, the widget is housed around the .lia-component-qanda-widget-ask-an-expert div class. Within that, you can style different levels of the component, depending on what it is you're looking to do (such as using a background image, color, etc.). I've attached an image showing some of the basic HTML structure -- see ask.PNG.
For reference, I've included a couple of useful articles that will help you in doing this -
Please let me know if any clarification is needed.
Cheers!
