Blue Flowered Impatiens namchabawensis in bloom!
I managed to locate seeds for these this past winter in the UK and they germinated easily. The color is unreal, just as you see it here- sky blue!
They seem to like open shade, at least here in central Maryland.
I have one planted in a pot with Impatiens Seashell 'Papaya'-should be a great combo!
Here is a link that might be useful: blue flowered impatiens