I have gotten so I do not use only one color in the top thread. I use a color in the bobbin that matches the back and change colors on the top to match or blend with whatever block I am quilting. That being said I find this only works well with walking foot quilting...when I try it FMQ...I am not as successful with the thread from the bobbin not pulling up. You might just stitch in the ditch for the light sashing in white and use a darker color for the blocks.