UPDATE: The fabulous Jennifer Sergent of DC by Design found the fabric!! Here's her comment:
You're not going to believe this. I thought that fabric looked very familiar, so I went back to a story I wrote for Luxe Interiors + Design this past fall, on a grand home in Fort Worth -- and sure enough, designer Joseph Minton used this fabric with abandon in the public areas -- It's Lee Jofa's hand-blocked Chinese Lantern.
Here's my story: http://dcbydesignblog.com/wp-content/uploads/2016/01/LuxeDallasMintonFeature.pdf
You can read her post w/the fabric here.
I have a couple of readers who are dying to know the name of this gorgeous fabric from my recent post on this room by Larry Hooke. If know what that's like - if anyone has any ideas that would me most welcome!
Also, there's a request for ideas on paint colors that would approximate the back of these bookshelves.