There are those waymarks that you pick up on to tell directions --"Turn left at the water tower" etc.
Some are normal. Some jump out at you and have a communal life to them -- everybody uses them because they are just so obvious. This has to be one of the latter -- the house is so bright and with out of the ordinary colors it begs to be mentioned in giving directions as in "once you get on Elysian Fields Avenue, go four blocks pass the bright house and turn left."
Of course, the person you are giving directions to will say "What bright house?" To which you will reply "you'll know what I mean when you see it."
Then you will tilt you eyes up a little and to the left and say under your breath "Only in New Orleans..... ONLY in New Orleans.