The closet walls are painted white, and the shelves are wood, but I covered them with fabric or batting before putting fabric in.
They're in the dryer now... that will set the stain if it didn't come out, but I won't use it if it's still there. Oh--I hope it washed out. These two blues are the perfect hue for this baby quilt. I think the second one I found will be fine, but the one I posted is the worry one.
I checked a bunch of other fabrics and they're fine.