Galaxy in Vanilla comes from 4th and Main Favorites, a batik collection designed by Scott Flanagan of 4th & Main Designs for Banyan Batiks by Northcott. The collection's palette runs from vanilla and soft gray through blue, charcoal, and black, and Galaxy's swirling design is one of its core prints.
Vanilla is the light end of that range, which makes it a natural background fabric. Batik texture gives a background more life than a flat solid while still letting pieced stars, compass blocks, or appliqué take the lead. It's also a good low-volume choice for scrappy quilts that need light values to keep darker prints from running together.
Because batiks are hand dyed using wax as a resist, color and pattern can vary slightly from bolt to bolt. If you need a lot of background for a large quilt, buy it all at once so your yardage matches. Batiks also tend to be tightly woven, so they hold crisp points and resist fraying, which helps with small piecing.