Originally Posted by smiles
I usually use a white, off white or beige for all my machine quilt sewing, except for my bindings then I use the matching color.
Use what you feel good about using.
I agree with Smiles.
I typically use an off white or some shade of beige, and also some greys for most of my piecing. I have a several different beige threads I keep on hand and tend to use the most. Using the beige thread color for piecing is cheaper on the budget. It also depends on the project.
The thread color for the binding should always match the binding fabric.
There is a current trend to use variegated threads for the quilting, but this depends on the quilt top and back fabrics.
Pam M