If your system has a monochrome backlight now, you need to replace the keyboard assembly with the optional RGB unit.  You cannot turn the former into the latter with software.  
Hello everyone,About 2 years ago I bought a Dell G5 15 5500 laptop. Recently I started to get more interested in gaming and I really want to change the color of the keyboard, but when I enter AWCC I get the message "No supported AlienFX devices". I have tried reinstalling AWCC multiple times or tried to install FX feature - still not showing. Is there any way to have this button and be able to change the color of the keyboard?Greetings and I look forward to your reply.
Changing keyboard colors