You might want to visit the website of Keepsake Quilting. I got their catalog today, and it had a number of pale fabric collections. For instance, you might look at Sandy Dune or Sandy Shores or the various Shirting collections. The Ice and Ivory, and White and Ivory, collections might appeal to her, too. Downstairs at Downton is quite pale, as are a number of other collections like Bali Sandstone and Bali Pastels and Sand Dollar Medley and Background Beauties Batiks and Sunshine Grays. Oh, so many to choose from!
Another way to go would be to make her a "whole cloth quilt." There's no piecing at all - just quilting.