It's not a full banner design, but I had thoughts about using some variation of this design for the background:
That particular quilt design is known as a Drunkard's Path, and you could select colors such that whatever text color you use contrasts with both design colors well enough to show up clearly.
![[Image: pj-1133-drunkards-path.jpg]](http://virtualquilter.files.wordpress.com/2010/09/pj-1133-drunkards-path.jpg)