Went to the local quilt store and found the perfect backing fabric! It is one of those Cotton and Steel fabrics.
It has 2 shades of blue as well as black in it and goes really well with the fabrics in the quilt. What do you think?
The only thing I don't love is that it is directional which is more of a pain to work with when getting the quilt ready for quilting. Making sure those lines on the back run straight takes a bit more care.
Well back to doing some marking so I can start pinning.