Hi, I have a question about how to take a pic. I was given an assignment of taking an outside picture on a sunny day using a regular flash. The person/subject has to be illuminated perfectly with the flash meanwhile all the background and surroundings have to be left in a navy blue color. This is possible, but I dont know how to make it (not using Photoshop). The only hint I got is that the solution to this scenery is related with the Theory of Color and not related with color temperature. Thanks in advance.