Oh my gosh - it's WORSE!!!
The cream fabric is no longer cream - it's a light teal (with the heavier blotches in patches).
Oh I could just cry.
I guess I'll keep washing it until no more dye comes out. Then I'm hanging it out to dry (e.g. whatever is left will get set by the heat).
(Yes the fabrics were pre-washed before piecing and quilting).