exterior: a verandah roof in "haint blue"

Just stumbled across this neat idea, from Apartment Therapy - painting the ceiling blue! Seems as though it is a traditional thing to do in the USA, especially on porches, as documented in the post "Painted Ceilings of the South",  but the idea is extended into interiors as well, see "Outside In: Blue Ceilings". Some nice examples:

[images from the above posts at AT]

Now, I'm not a huge fan of blue in general - there are some shades I LOVE but there are just so many shades of blue and many of the examples you come across day to day are quite awful (think Glad lids, blue plastic cups, office furniture... *shudder*). Duck egg blue, Tiffany blue, the blue of our formal lounge dining in the house I grew up in, I like those blues. So the use of a really nice blue on the ceiling of my verandah could really work. It'd have to be a slightly dirty, slighty green-tinged cool blue, and would need some serious intensity and depth - nothing namby pamby, given the deep grey I have chosen for the walls.