I have never seen the ability to change the front-panel's color programmatically but in the later versions of LabVIEW you can place a large "decoration" like a recessed/raised/flat box behind everything on the front panel and then programmatically change the color of the decoration. It takes a bit of work to get the reference to the decoration and if your front panel has multiple decorations present then you will need to figure out which is the right one to colorize but you should be able to go for the one with the greatest size if it fills the entire front panel. The attached VI is LV v2014.
