I’m not sure I know what “reformed” is. But there sure is alot of that too.
Reformed would be Reformed Church in America (one of the oldest bodies in NA), and a few smaller churches. Where these are at (west Michigan and Iowa), I'm guessing Christian Reformed Church. Theologically, ideally, they should be lumped together with Presbyterians, who are now classified as "other", as the major differences between them have to do with country of origin.
"Other", noted as grey. A few counties out west, and most of Alaska. Is there a blessed (but chilly) Presbyterian Shangri-La out there somewhere? Probably not. That "strangers and sojourners in this world" thing.
Interesting. After looking at the map a second time, I realized there are TWO different blues. The blue that covers a large portion of the map is catholic. The reform blue is a very small percentage.