Once you have the actual curtain, and the mounting hardware is in place, you could try one of each if desired. Borrow a black rod from the next room, and try a gold style as well.

Black would repeat your chair color and bring more contrast. However, gold would provide a little bling, and won't look as heavy against a light drape and wall. The white and gold balloons in the photo look good, and give some idea of how that combo might infuse a little life. Whichever you choose, I'd find a way to add a bit of color the dining space to break up all brown wood. Perhaps painting the mirror a fun color? Or switching out the white lampshades for a colorful shade. A table runner is another easy fix. If your budget allowed, you could do a more colorful rug, and also a size larger.

Thank you! The dining room chairs are actually an indigo color (indigo/blue is accent color throughout first floor, I just added some blue and white ginger jars on top of the tall armoire). I was hoping to add more color in the room with patterend curtains but the hubby is very picky and prefers a neutral color so we are going with solid white curtains. I'm planning on placing a seagrass/jute rug under the current turkish style rug which will be bigger. I would have never thought about changing the lampshades, I like that idea!

Half your room is contemporary and half is retro old. There is no problem with mixing styles but there should not be a dividing line in the room. I would recommend you replace the mirror and lamps on your dresser with something that brings in black or brass. And the horizontal mirror does nothing for the total effect in the room.

I've added rugs to pull the whole look together for the room.

If the chairs are a blue and with the brown furniture, I think a gold rod might work better. A bigger rug, too. That rug looks a bit too small.