I have not been doing much lately so I decided to spice up the webmail used by my clients and myself. The base is Roundecube  and the skin was originally by Mr. Dieck but heavily modified by me. This is what it currently looks like:
It’s an ongoing project, but I think that it looks far better than the default “Larry”-skin used in Roundcube, in my view.
The “Larry”-skin looks like this:
Right. That’s it!
1. The Roundcube Webmail suite: https://github.com/roundcube/roundcubemail