I think purple is better for this
I Have Blue Walls, Tan Couch And Off-white Drapes. What Color Throw Pillows On The Couch?
Most definitely blue.
I think I would look for throw pillows with those colors in them .stripes or prints will tie everything together. Try some candles in the same colors around the room, too.
You don't want to go witht he same color because it makes the room boring. If I were you I'd buya light coral colored throw pillows. Blue and coral go very nice together. And it makes the room pop without being too bold.