Board Thread:Administrator's Noticeboard/@comment-28931162-20170618070754/@comment-4661596-20170618212331

http://custom.wikia.com/wiki/Monobook

The above link may help you on figuring out how this type of image works. It is a monobook wordmark, and seems to be tied to css and js. Unfortunately this isn't my area of expertise, but I hope this link can lead you towards figuring it out.