Board Thread:Support Requests - Getting Technical/@comment-25748513-20170531234639/@comment-9605025-20170601000544

First off, the image you are referring to is called the wordmark.

Are you referring to http://scp-wiki.wikidot.com? It appears that Wikidot has its own code that it uses. In contrast, Fandom/Wikia users MediaWiki. Even though both host wiki sites, the difference in background code means potentially a world of difference in terms of available features. Even if similar features are present, there can still be a significant difference in both how an author uses the feature and how the feature is implemented.

To get back to your question, no; MediaWiki, or at least Fandom/Wikia, does not support using different themes and/or wordmarks on the same wiki. The whole purpose of having them is to provide consistent appearance to the entire wiki. Having the ability to change them from page to page thus defeats the purpose of having themes and wordmarks in the first place.

That being said, you could probably work around this with CSS. However, I am guessing it would be quite involved as you would need to override quite a bit of the default CSS.