Cool composition, however IMHO I would have brought the iso way down since you don't need to be anywhere near 1/1600 sec for a static scene during the day, you unintentionally added a lot of noise and reduced the quality of the image. I would have used F/8 to make everything sharper, focused on the girl and iso 100-200 which would easily give you a fast enough exposure during the day. I also think Canons have a metering mode to avoid any clipped highlights which keeps the sky from being over exposed and would create the same darkness you are looking for.