Serve a different admin theme for a user role I am making a news website. I want the administrator to have the default drupal 7 theme Seven. But I want to give the editor a custom theme that is more usable and streamlined for the task they do. 

I have seen this module called ThemeKey. As far as I read it gives a lot of functions. For me as now only thing I want is when the user of the role editor login, they should be served with different admin theme. Thats all. Is there any hooks or something? Are there any examples or recommendations for achieving this?
I think that this module does exactly what you need, I used it on a project and works very well

Role theme switcher module