Make it all blue-ish green. This one is easy! Wear blue jeans, a blue top, a blue headband, blue shoes. Hell, even PAINT YOUR NAILS BLUE! =] Get half of a bed sheet(with darling Mother's permission) and paint it blue. Cut out a hole for the head and ...
If you have the address of the hotel do a search on multimap. Paris underground stations are marked with a Blue M in a circle. Greater usually means the outer areas just outside the city centre.
Depends on which Paris you mean. I would like to visit the City of Paris, but this other Paris is no longer on my radar scope.