So with a colorful top like this, what color thread should I use to quilt it? Should I change color for every section?
Thanks

match the backing

Don't know, but GO BROWNS and GO TRIBE!!

I would use a neutral ecru.

good suggestion, thanks

Personally when in doubt , pick a varigated.

Superiors 402

tan/brown. Football season is almost here...YEA cooler weather:):)

neutrals- gray's blend in very well on busy colorful quilts

The judges at the fair didn't like it that I didn't match the backing thread for my hand quilting

You match the backing? Don't that cover up the design of front?

I see lots of orange - except in the white area - I'd change to a white thread for that area.

Don't know how much work it would be, but I say go bold and use contrasting color thread for each section.

+1 :)

and Buckeyes.

By the way, to answer your question, you can change with each block row and it wouldn't be that big of a deal. For instance, for the Browns fabric use a brown or an orange, for the Tribe fabric use a navy , the golf bags --a green.
Your quilt design would be easy to quilt by sections of color/ fabric.

i would use a variagated thread for the dark and probably change color for the light section.