|When choosing thread for my garments I always choose an off-color thread for the bobbin ~ just a few shades off so that it's not distasteful on the finished garment. I do this so it's easy to see if seams need to be adjusted; or for areas that need to match exactly, such as notched collars; or for finicky things like welt pockets and bound buttonholes. For instance, my recent project was made of a light color fabric of cream and light beige. For the bobbin thread, I chose the softest of yellow thread which contrasted enough for easy removal if necesary ~ less obvious than if I went with a beige (which would have been too dark). I usually try to choose one or two shades lighter, not darker than the fabric so won't show on the finished garment. It's such an easy aid for that dreaded unpicking if you have to do it!