Question about name reservation from Green BACK to Blue

[Cen]

If I make a character on Blue before Green came out, then got my name on Green, can I wipe out the name on Blue now and safely keep it when the Green guy eventually goes to Blue? Or can the name which is taken on Green be made by someone else on Blue then? I know Green names are reserved by blue, but is the vice versa true? I can test myself but I have to do a bit of prep work ;p