or create your own skin following the approach in this help article.
You may also find useful this forum thread explaining how to set custom colors to the horizontal/vertical scrollbars through CSS and why scrollbars are not decorated across all browsers.
All the best,
Danail Vasilev
the Telerik team
Explore the entire set of ASP.NET AJAX controls we offer here and browse the myriad online demos to learn more about the components and the features they incorporate.