If you are using an off-white/cream solid, the light cream of the wool batting won't change the color of the quilt. If you are concerned, you can use a double batting - a bleached white batting (like Warm and White) on top and wool on the bottom. I honestly don't think you would have a problem with just a wool batting. I love the way the quilting shows with wool, it is warm in the winter and yet cool enough for summer - breathes really well - and it doesn't hold wrinkles like cotton. However, when you wash wool, I have found it to shrink much more then cotton. If you don't want your quilt to shrink and crinkle, soak the batting in hot water, spin out water in washer, and dry in a dryer with some dryer balls or clean tennis balls for about 30 minutes.