Kaweco Palm Green is a medium green ink, with a lot of shading. I wasn’t even sure I’d like it, but it turned out to be a very appealing ink that’s going to be my standard green ink going forward.
Diamine Shimmertastic Night Sky is a black ink with silver particles. I’ve used Night Sky in vintage Pelikans and a Parker Reflex. It stays dark and silvery with all of them.