So a door frame is not a creature or beast, but there is still folk lore that revolves are them. A Green or Blue door frame or window frame is thought to be a deterrent to witches. Within the old wives tale, it's said that a witch is unable to pass through a frame which is blue or green. For me this adds a new dimension to walking down the street. In most older neighbourhoods you can find a number of homes with this stylistic feature. Perhaps this shows just how seriously people used to take what we now refer to a myth.