Type Hero is a website lets you try out all of Google fonts with multiple color combinations. You could use it pick a font for your startup logo or tag-line and test it with awesome color pallets. It lets you search for Google fonts, change the canvas color, text color and also font size & weight/style.
Test Google Fonts in a more stylish and realistic environment with this tool that lets you pick a color for the background and type, and then test anything in the Google Fonts collection.