A couple of newbie questions

Yap, you got it right. The light blue bar is the Eco guidance. Presumably, if you keep your actual acceleration (pedal input) shown by the dark blue bar to be within the light blue, then you will achieve a better fuel efficiency. However, the guidance is not perfect. It is not very useful when you are driving on EV mode. As long as you try to keep your foot light on the pedal and avoid quick and hard acceleration and breaking, you will achieve very good fuel efficiency both in gas engine operated HV mode and battery operated EV mode.