When the AC battery is at 6%, the color of the cells and the voltage metric are green. The screen capture was taken just after landing the AC.

I'm sure I've seen them yellow, or maybe red, under this condition. The values look reasonable but the color does not.

I could be wrong, but i think the color is indicated by the voltage of each cell. I believe that once they go under 3.5v, they turn yellow. once they hit 3.2v, they turn red.

After you land the cells stabilize and settle down and the voltage will increase because there is no load (motors not running anymore)
While flying and your battery gets low you will see the yellow and if you fly really low the red bars.

DJI-Ken Posted at 2016-6-23 13:14
After you land the cells stabilize and settle down and the voltage will increase because there is no ...

Confirmed. Just before landing, the battery color was yellow. After landing and the propellers stopped, the battery color was green, the voltage was higher, the Remaining Power was lower and the Temperature was higher. The other three metrics remained the same.

Airspace Explor Posted at 2016-6-25 01:22
Confirmed. Just before landing, the battery color was yellow. After landing and the propellers sto ...

Correct, that's how it should work.

DJI-Ken Posted at 2016-6-23 16:14
After you land the cells stabilize and settle down and the voltage will increase because there is no ...

Awesome technical response as always, Ken!

Flight Raptor Posted at 2016-6-25 04:29
Awesome technical response as always, Ken!

Ha, I don't know how technical it was but I think I got the point across of what I was trying to say.
Thanks