Led blinking for no reason

The title says it all really. Been running RR for a couple of weeks but last night my LED was blinking blue but there was no notification, it was unplugged and 73% charged at the time. I played about in the LED settings and it stopped when I changed the low charge LED colour from blue to red. Any ideas why it did it?

Thanks

from xda-developers http://ift.tt/2daxlmJ
via IFTTT