The new colour scheme for names is as follows:
Registered users (fewer than 100 posts, and here less than 90 days): Black
Registered Senior members (100 to 1000 posts, here more than 90 days): Black
Valued Senior members (more than 1000 posts): Green
Moderators and admins: Blue
At present, this is experimental. Comments are most welcome. The current colours aren't set in stone.
By the way, if you're a Valued Senior Member you may notice a few minor changes in terms of your use of the forum and what you see when you view threads. I won't list them, because mostly they are minor tweaks. They give long-term members a bit more access to information about post deletions and edits, infractions etc., which seems fair enough for our dedicated posters.