I'd probably go with a light or medium purple as well. Nicely done, btw.

I'm drooling over that hand quilted red & white quilt underneath the DWR!

Lots of good advice! Please post a finished picture!! (for me it would take several years to hand quilt something like this.)

depends on the effect you are looking for. If you want it to blend in use light if you want to make the stitching pop use dark purple

Ditto what MatiMorga said.

I would go with light to medium purple, just a shade or two darker than the rings, although I've used variegated thread, which gives it a whole different dimension to the quilt. The quilt is very beautiful - love the violet.

Is there a variegated with some lime green blending with the shades of purple? How adventurous are you? How adventurous are the recipients? Something to think about??? Good luck. It is lovely.