GrammaNan, I'm with you. I never buy fabric, except for a particular quilt. So my "scraps" are bits and pieces too, rarely more than 1/4 yard. I will certainly have to buy whites or blacks when I finally do a scrappy quilt. I really prefer scrappies that have neutral sashings and/or borders.
On second thought, I guess I have done three quilts with Marimekko scraps that were gifted to me, and I bought Kona White to sash and border all of them.