The latest version of Ribbon JS includes methods for creating contextual (highlighted) tab groups, supporting custom colors and labels. Check the code for this example.
Use this document as a complete copy/paste reference for a ribbon configuration.
More Ribbon JS Demos
Check the rest of the demos. There's much more cool stuff you haven't seen yet. Thinking of a feature that you would like to see in Ribbon JS? Suggest it here and it will make it in the next release.