i don't know your skill level but there's a book called Bella Bella Quilts.
the designs in the book are based on mosaic tiled floors so it could work well in this situation.
some of the patterns are very easy and some are advanced so if you do buy the book it will certainly grow with you as your skills improve.
here's a link to her website and you can see many quilts in different colors and styles done by her and students of the books.
http://www.bellabellaquilts.com/home.html