My favorite tone on tone fabrics is Robert Kaufman's Fusions line, specifically Fusions 7 (their #5573). They have a new color called "Vanilla" that looks like it would be the color you are looking for.
Go to www.webfabrics.com and look up Fusions to see all the colors, then go to www.quiltshops.com to see who has it on sale.
This is a very high quality fabric, and I use it in all my quilts as my blenders because it is so beautiful.
Diane