Board Thread:Support Requests - Designing Your Wikia/@comment-2240397-20160211204935/@comment-168424-20160216190354

Qoushik wrote: Border, rounded corners, and much more. I added borders to my infoboxes by placing the infobox inside a table. See example here.

Nice infobox, but not really pertinent, since Template:InfoboxBLD isn't a portable infobox.

This is not your fault, since the original post did not specify it was about portable infoboxes (although it should have).