You can examine the templates provided and the CSS that's contained in the theme. An alternative would be to use a developer's tool like FireBUg and inspect the elements of interest and see the CSS applied to them - you'll need to revise this CSS in the theme so you can load your own images.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items