My apologies if this has already been asked but what do the various colors of the battery indicator mean?

I notice that if the battery indicator is green the car seems to switch much easier in to EV mode. Whereas it seems to take a bit more effort on my part to get it to do that when the battery is blue.

Second question, I usually use the consumption view...with the updated chart of the mpg for thirty minutes...laid out in 5 minute increments. I want to understand more about the other display that shows how the power is flowing. I know what it's showing but how are people using that display? I would appreciate any insight into it.

Also, has anyone else noticed that the FAN button doesn't have a light when it is pressed/depressed. The other buttons do.

Thanks

Byron