To me it's the total number of different fabrics, not necessarily that they are alll true "scraps", i.e. leftovers from some other project. I just LOVE scrappy quilts, the more fabrics and styles of fabric the better. I mix florals with plaids and batiks and reproduction prints, and often throw in a novelty print or two just to bring a smile. And I totally agree with all the others who have said it's more about value placement than color with a scrap quilt.