The problem with giving other ranks different forum colors if the fact it gets confusing. When you put someone into the moderator group of the forums, their name is automatically blue. If you put them in administrative, it would be green. Unless for every person you have custom coding and/or subgroups that can change their name color, it won't happen. It is possible and I hope it happens... may just not be as easy as some of you think. Also, you need to be in one of those groups as your main to be accounted as a staff online. Just like the builders have different forum color, the globals should as well. As for ingame, instead of having a other color which may confuse people even more, why not have a global moderator prefix?
Support. I personally like what Agent had suggested. From what I understand you saying, couldn't there just be 3 staff positions? Normal moderator - Dark Blue Administrative - Green Global Moderator - [Chosen Color] Put all non-global moderators into the Normal Moderator position, Cypriot and Crew into the Administrative positions, and all of the Global Moderators in the Global position.
No, only 2 are built in the forums. Globals would need to be in the moderator group but just with a subgroup to change the color.