Sure
Foxflower, a blender is a fabric usually in a neutral color (can be tone on tone) that will "blend" with a lot of different color fabrics. Marbles, Fusions are examples. I like to find creams and tans to use as blenders for some of my scrappy's.
Here's what fabric.com offers as blenders:
http://www.fabric.com/quilting-fabri...-by-color.aspx