Originally Posted by Candace

Only if the fabric is light with little patterning. If you have pieces of your quilt top sewed down to it, the fabric could show through any lighter quilt top fabric. Does that make sense? That's why most folks use muslin or white fabric as the base. Now, if you're using dark fabrics only on top it wouldn't matter as much. Though it would be safest to pick out your top fabrics and place them over your 'what was I thinking' fabric to see if it shows through.