Default What is yellow-ish LED telling me?

When plugged into the charger the LED flashes Red until it's charged...Green when 100%...Blue when I have a notification. Sometimes I find it flashing on odd orange/green spot. What the heck is THAT?
I'm worried about it because in my earlier days of tinkering with electronics I found that when you overdrive a red LED it will look similar--right before it burns out
Galaxy S3
Recent Net10 refuge now on AT&T