Normally, invisible thread is used to help make quilts because it is impossible to find a thread color to match all the colors used in making quilts.
Thread color for quilting modern quilts
Use invisible thread to 'stitch in the ditch
Your Complete Guide to Sewing & Quilting Threads
Best Invisible Thread for Sewing, Beading, and More –
Superior's Applique Threads
Sewing Basics : How to Use Invisible Sewing Thread
Machine Sewing with Invisible Thread
What is Invisible Thread Used For? (Quilting, Sewing Machine)
Quilting with Clear Thread: Tame the Invisible Thread Beast
Beginner's Guide To Machine Quilting: Thread Fiber Types