Apparently the blue is made from indigo and it varies depending how much they mix, all the painting is done by the ladies who are not allowed to climb ladders as the men may see there ankles (plus they don't wear underwear!!) and if you have hairy legs its supposed to send the men wild - how cultures vary!!! :lol: :lol: On the passages where the floor is painted blue too, it signifies that it is a private alleyway so strangers know not to enter.