The RadPanel control comes with all the features of a standard panel and the additional ability to customize the appearance. You can refer to the HTML-like Text Formatting article to understand how to set a border, border width, background with a linear gradient, and Html-like formatted text. You can also use Smart Tags and set Properties.
In the related Getting Started article you can find how to use the control with a sample scenario.
Download and check out the online demo at demos.telerik.com