We call it 'first footing' in Scotland.
And blonde is definitely bad! (goes back to the days of the Vikings, when a blonde stranger at your door was a bad thing indeed!)
In the old days, good luck was a dark-haired male bringing coal, salt or black bun.
Nowadays, it's still a dark-haired male, but he normally brings whisky or maybe shortbread.
Never heard the bit about going out the back door, though...
