By default Microsoft Word 2007 comes with a blue color scheme. However, Word 2007 also comes inbuilt with two separate themes, viz. Silver and Black.
If you’re bored of the plain old white Gmail background, then one option is to use the Better Gmail Firefox extension which added a few themes. Gmail now comes with several different skins that you can use to beautify your inbox. In a quote from their blog post: We wanted to go beyond simple color customization, so out of the 30 odd themes we’re launching today, there’s a shiny theme with chrome styling, another one that turns your inbox into a retro notepad, nature themes that change scenery over time, weather driven themes that can rain on your mailbox, and fun characters to keep you in good company.