I have been told by Handi Quilter representatives that it is impossible to use two different color threads, one light in the bobbin, the other top thread a dark color that matches the top quilt border because the light bobbin thread will show on the top of the quilt mixed with the darker color top thread. I was told to use the same color thread in the bobbin and top thread.
My question is, in doing this, if your back fabric is a solid ivory color, and you use different color threads stitching your quilt, the back of your quilt will be stitched in different color thread giving your quilt back a "rainbow" of thread color. Is the acceptable to judges judging your quilt in a quilt show????