Just about every quilt has an assortment of color in it except for whole cloth quilts. Choose a color that pulls the top together. On a lot of quilts I use a grey tone which seems to draw color to itself and refects the color that it is on. In most cases I work to suite the top not the back of a quilt. There are few exceptions to this choice.
I usually use same thread in top and bobbin. If a quilt is darker I use a darker color and if lighter ...
I try not to have a light top and dark back or reverse. This just complicates the work.
Remember that using the same thread in both top & bobbin hides a multitude of problems.
EDIT: Remember there are no absolutes and thread doesn't have to match everything. What color is the majority of the quilt, red, green or black? This may be a good place to start.
Can you post a pic of the top?
Last edited by ube quilting; 09-24-2012 at 03:09 PM.