I remember reading somewhere that the classical Renaissance depiction of Jesus, with the long flowing hair and beard, was based on the Shroud of Turin ... which surfaced at about the same time. From a "mystical" standpoint, though, I think the blue eyes that many old paintings of Jesus have used is a symbol of someone who is spiritually enlightened; and the reddish hair may be symbological of fire (the fire of the spirit). It is very likely, though, that Jesus looked more like the men shown above (with or without long hair, their features are very similar).