It depends on the color of the fabric. Whatever you decide do NOT use colored powder chalk. Lots of posts here about the difficulty that it won't remove from the quilt. With machine quilting on white, I use the purple be gone. You have to quilt within 48 hours so I mark as I go. With dark fabric, I use powder white chalk. If I was hand quilting, I would probably use a blue be gone but no heat or it will set permanently. Comes out easily when quilt is washed.