If you'd like a pattern, I would recommend something very simple, tone on tone. I've seen this is a muted gold or beige stripe and it was very elegant. I'd also look for different fonts, something more elegant. Bernhard Modern is an elegant serif font. Avoid too much in the way of script fonts I would say.
Ok, my creative urge took over and I did a sample for you. I couldn't help myself; that's the only way I can justify the time because I have plenty of other work to do.
The fonts used were Boulevard (muted gold) for the script and Bernhard Modern (dark green) for the serif.
The border around the portrait is a gray-green. Also, maybe "portraits" should have been in the gold and Bernhard Modern like "family heirloom". I'm undecided on that. Or smaller and in the gray-green of the border.
Geez, now that I've loaded it, I see the colors are similar to the forum! Guess I'm consistent in my color preferences.