When I was a teenager it was sideburns to the center of the ear and no colored shirts. As a matter of fact the congregation overseer cut out of a magazine of a picture of a young man and posted it on the back bulletin board. He wrote comments on it like, "see where his sideburns are", "hair over the ears" etc. I was told after the society said those pictures were not to be taken as an example but they were only trying to show a modest or neutral example.
Will