SFGate

Alexei Rebrov Art I can suggest red, blue or pink/purple abstract print from my collection for the plum wall.
http://alexeirebrov.com/collections/purple/products/abstract-print-on-aluminum-3707
It will look refreshing.

I attached an example of a triptych on a pink wall but it will work very well on darker color wall as well.

Are you considering something like this?

Reflections Interior Designs My thought would be to add a little plum coloured art to the tan wall to tie it together, very large art for a large wall. Then on the purple wall, a set of decorative metal scrolled lattice type panels might work well as you could see through them, again, very large in size. Too small art would chop up the room and look too busy. Jil
www.ReflectionsInteriorDesigns.com

Amy Consider re-painting dark purple to lighter one to make it balance. You're dining table & chairs are already too dark. You can change those light fixture with chandelier or pendant lights. Add either a rectangular mirror, small little plates or a nice art on the left side corner and a nice buffet table.

Amy Small round plates, lighter purple & chandelier

Darzy It looks like you like contemporary yet traditional too and would like a bit of sophistication.

Interiors International, Inc. You most definitely need art. Although I like the work above it doesn't look like your style. I could be wrong art speaks to everyone differently.

Darzy Motorola1... do you love the chandelier? Is that staying? Because I think the chandelier leans toward more traditional art. What is your style preference?

stefspad I would do one big art piece or poster on one wall and put together a gallery wall on the other. Art is SO subjective it's hard to recommend one piece over another. I recently put a gallery wall together (based on ideas I got on houzz and small pieces of art I had all around the house) and found that I like photos and prints of nature (birds, trees, landscapes, etc.). First figure out what makes you happy art-wise, and go from there.