Looks like the 5090 (2019) only came with blue lighting, the newer 5000 (2020) has color changing. 
Hi all, I purchased a G5 5090 in February 2020.  I just noticed on dell website that some models are shown with green lighting... Mine has always been blue, and when I start alienware command center it says "no supported alienFX devices detected." Was RGB always installed, or did this change at some point? One post says doing a full restore (or before win 10 update) fixed it, but would rather not attempt unless I know it is possible. 
Did all G5 towers come with RGB lighting?