hello im having an issue finding where to change the background for this drop down menu, ive searched every item in the forum settings.
You have to hover over the options to see them.
This forum is for issues with Wix Code on your page.
As it looks like you are using the Wix Forum app, then you are best suited going to Wix Support pages about it.
https://support.wix.com/en/wix-forum-1170773/setting-up-your-forum
Or contacting Wix Support directly.
https://support.wix.com/en/article/contacting-wix-support
Wix Blog also have their own support pages too.
https://support.wix.com/en/new-wix-blog/setting-up-the-new-wix-blog