I'm always looking for tone on tone to add color and just a little texture. I also have trouble finding shirting to go with Civil War blocks. The way I usually select fabric is to find a gorgeous focus fabric and then build around that. I have found really pretty focal fabrics very hard to find. I like vibrant florals or pretty geometrics, but don't really care for the modernistic designs much. I tend to be more of a traditional quilter and being fairly new to quilting, I still make mostly bed-sized quilts.
Pantone says the color of this year is Tangerine Tango, which will be the color we'll be seeing in many manufactured goods like clothing and cosmetics, I'm guessing. Last year's color sure was everywhere! As I recall it was some kind of vibrant pink.