Stink Bug. They are usually darker in our neck of the woods, more of a brownish color.

If it makes anyone feel any better, yesterday I was home from work and was swarmed with the Asian Ladybugs, Stink Bugs, Box Elder Bugs, as well as spiders. Only the Ladybugs (and lots of them, thank you) make it inside the house. It's all part of living where I do, you've got to take the good with the bad! Still no Wooly Bears, though, Ellie!