Funny! I was just considering asking the same question. I only buy dark cream color, and medium and dark "mushroom" colors. Sometimes I'll be sewing a light color fabric to a medium color fabric and realize I'm using a dark thread, but I never seem to take the time to change thread. With all the different colors and hues that go into one quilt, it seems changing the thread to match the fabrics would be maddening. I sure hope I don't regret this shortcut someday.