How to change the theme of your SharePoint Foundation site using the pre-installed themes.
1. You will need to start by navigating to your SharePoint URL. (team.website.com) Followed by logging into your SharePoint site with the administrative credentials.
2. In the upper LEFT hand corner click on Site Actions, then select Site Settings.
3. Under the Look and Feel section, select Site Theme.
4. Select Your Theme and press Apply.
