User blog comment:Seadrus/IN NEED OF DESIGN KNOWLEDGE!/@comment-11733175-20131031110712

For the Dr. Who Wiki customisations, I suggest talking to an admin over there. I'm sure CzechOut would be happy to show you how it's been done.

For the admin colours, it's done with CSS. We keep a version of the hihglight code here on dev at Highlight/code.css. It's probably a bit big for most wikis, but it shows the basic principle of how it works.

Altering the way chat looks to the extent you're suggesting... it probably can be done, but it's a huge undertaking to make sure it all works fine. I'd be surprised if you'd find anyone willing to have a go, let alone support and maintain such a script.

Like this for the boxes?

The TOC will always contain all the header. What you can do is mimic a header with CSS:

Mimic headers