Today (Nov 8, 2018) I upgrade this forum software. This was more than just a bug/security patch. This was jumping 2 full feature patches (v3.0.x to 3.2.x).
Because of this, the tan and orange theme we used to have is no longer compatible. I have not found anything similar yet, and I'm not in a rush to try to create my own. If there are any front end devs out there that want to take a stab at modifying the default colors, PM me. Otherwise expect to stick with this new color scheme.
While I took care to test and find all the bugs ahead of time, I know I didn't anticipate everything. Again, please PM me if you suspect you've found a broken part of the forums OR ON THE MAIN WEBSITE. The main site uses parts of these forums for user authentication, so there may be bugs or problems out there too.