Tab Colors Change in Extensibility

Hi, I'm creating a SQL Server Management Studio Add-in, I want to change the color of the Tab based in some configuration that the user does, I already got the configuration part over control, but I can't figure out how to change the Back Color of a EnvDTE.Window or EnvDTE.Window2 object, can someone show a light on this.

Note: I know that is possible because someone did an add-in like this to Visual Studio, below his/her site:

http://www.tabsstudio.com/