Northeast and Northern Midwest - A good mixture for lawns in zone 6 or colder should contain 50 percent Kentucky bluegrass and 30 to 40 percent red fescue. It should also contain 10 to 20 percent of perennial ryegrass. Avoid tall fescues in this area unless you're seeding a yard that is used very heavily.
The combination of these grasses will bring color, toughness and durability to your yard. Some of the grass will help out during times of drought and if shaded by trees for the better part of the day. The ryegrass will provide a quick green cover that prevents erosion, while the slower germinating bluegrass and fescue germinate underneath.
I'm not sure how far northeast you are, so this is what I found based on your question. If this is the wrong part of the northeast let me know and I'll find that info., for you.