The factory ambient lighting is the cupholder, overhead mini-console downlight and front door handles/lower pockets. It is a light greenish color, matches the other dash/door buttons and lights.
The multi-color footwell ambient lighting is an optional kit from Mopar. Installation is somewhat involved and you have to take apart a lot of the dash and console to install it. Also, the kit is not cheap and if you have the dealer install it will be even more expensive. I am not about to start tearing my GC apart, cutting/splicing wires and inviting rattles down the road to add this feature. Do a search, there is a recent link with detailed informaton and photos of an installation in a member's GC by a dealer.
I have driven many Ford SUV's from our company fleet with their multi-color ambient lighting. It is interesting for about 5 minutes, then you get bored and tend to pick a color and stick with it. The foot-well lighting is a little annoying when driving at night. Personnally, I much prefer my GC ambient lighting - just enough and I like the greenish color.