If you are not sure that your chosen colors, elements and unusual shapes will work perfectly together, then choose some pretty nice different elements such as beautiful and interesting sculpture. This will look amazing with black furniture, wherein chairs and floor could be black as well.
The general view is also important. Thus, it is better to place dining furniture near the window to show the pieces in all the beauty. This method allows using the colors visible through the windows while this the interior in the room could stay neutral and simple.