Looks like a Corydalis.

I think that's it--our native pink corydalis, Capnoides/Corydalis sempervirens. It must have seeded here. This assumption may not be the case, but I am under the impression that the pink variety has the blue/green/grey leaves, whereas the yellow varieties have more true green leaves. Let me know if that's not correct. Thank you!

Yes, it is the Capnoides sempervirens that has the blue foliage. It is one of my favorite natives.