Hi Serg,
It's a mixture of Real Enviroment, Enviromental 5 plus the scene file which Hitman uploaded for the RFB mod a few days back, plus the enviroment files from Lurker's OMEGU mod, so a real mix!
Best to use would be Enviromental 5 and drop in Lurkers enviroment files - they should give you a similar colour set.
Mike.