I think I would look for the blue fabric with your browns in it or visaversa. Very popular color combination for fabric right now. Would look stunning. You can use any type of pattern in the fabric as long as it goes with the colors you choose.
Another thought, if you wanted to do a strip of the baby blue. I made valances that are navy above the pocket rod, then reg. material, then navy over the rod portion, big drop down of reg. fabric and then end it with a 3" navy at the bottom.