the blue houses of Jodhpur

I've now found out why the houses in Jodhpur are painted blue: apparently the colour blue means good luck, and is also the colour of the Brahmins, Indias highest caste. So the Brahmins were the only one's allowed to paint their houses blue. However, to create the paint limestone was added in the mix, and limestone keeps the mosquitos away. So a tripple whammy for the Brahmins then.