These are pictures of the custom quilting we recently finished for a customer. We used the same thread on the back of the quilt and switched between black and a variegated blue/green thread. The hardest part was remembering that we were using the same thread on the back, when we went to do the black areas, I put black thread in the bobbin. (un-sewing for me, fortunately it was only about an inch.)
In the middle of the quilt is a tiny crab motif. I think if you squint you can see it. Ginny was so happy and excited that she gave Amanda a big hug!