Nexus 6 Hidden Notification LED Has Been Found!
The Nexus 6 is the first Nexus to come with Ambient Display, which was originally thought as the reason for the removal of a RGB notification LED found on many phones, including previous generation Nexus devices. Well turns out the notification LED is still there!
A user on XDA-Developers accidentally discovered the notification LED while playing around with the popular 3rd party notification LED app LightFlow, which then resulted in the original app developer to fully enable the rest of the colours (red and blue). It would make sense why this was disabled, but it would be much better if Android allowed the user to decided whether or not they prefer Ambient Display vs Notification LED. As of now, the only way to enable this for notifications is if the phone is rooted.
Now if only someone could find a hidden SD card slot.