V,
I've been thinking about your quilt.... Have you considered using clear nylon thread? You wouldn't have to worry about the color then.
Having suggested it, I should tell you I don't like it as well as cotton thread because it leaves little pokey things if you stop & start & don't just go from edge to edge.
Maybe you could go from point to opposite point on the stars?
I always find deciding on the quilting is the hardest part of all. Good luck!!!!!
Jo