So I am abut to start painting a fallen librarian and have a pretty good guide on how to paint horus heresy Dark Angels but I am not sure what librarians looked like during this time. I seem to remember from the book that has the edict of nikea in it that the librarians had the blue color that we know today but I cannot remember if it was just an arm that was blue, or they were all blue except for an arm that was their original chapter colour. Any help would be greatly appreciated, cheers.