The dominant colour that I see in this is blue ...

I always had trouble staying in that darn ditch - I found a lot more success using some of the decorative stitches. If your machine has a couple of different decorative stitches, you could alternate those - just sew those down the seamlines instead of stitching in the ditch.

Depending on the size each square you have, and the batting you use, you might be able to do every other row.

Nice job on scattering the colours throughout the quilt - you got nice movement. Way to go!

Dark Grey would look really good.

Oh, this quilt is so lovely! Does your machine do decorative stitches? You could use these to follow the seams or crosshatch (x's in the squares.) What ever you do will be lovely.

It's a lovely quilt. What you choose for backing could help decide what you want to use. However I like variegated threads, there are some nice ones that would work with most of your fabric colors. Take your quilt to the store, lay different threads on top to see what complements it best.

Then try the purple thread ... solid or a variegated. I think it could work well with the colours you have in the front.

That is what I might use.

I would use Mother Goose color which is a carmel color blends very well.

Charmy how would you quilt?

I will have to look up meander quilting.

You could quilt it corner to corner...love the bright colors!