Actually, this has indeed been shown to be the case. Grant Whitmer of lavenderalbino.com found that the darkest normals/hets produced Lavender Albinos with the brightest shades of purple. I'd be willing to bet someone has crossed Pastels with light-colored normals to produce Even Better Pastels(TM).
I have a reduced normal female who will be fantastic for morphs. I also have a very nice normal male with a spider-like pattern who would make some wicked spiders.