For 4.1, EV mode is what you refer to right afterwards as "driving in the blue"--EV mode means (at least I assume, as it means this in other areas) "electric vehicle" mode. This is what you're in any time you're traveling purely on battery. The "mode" you're referring to, that you can get into after an ~8 second stop while the ICE is fully warmed up, is often referred to here in the forums as "full hybrid" mode, which just means the car is primed to switch freely between EV mode and ICE driving while the speed is under 40 mph. Any time you're not in this "full hybrid" mode, the only ways to switch to EV/electric driving is to slowly accelerate from a full stop, or to come down from 40+ mph. And if not in "full hybrid" mode, if at any time you trigger the ICE firing up by accelerating, you will not be able to switch back to EV without doing the 40+ or cold start again. In "full hybrid" this isn't a problem as it switches instantly from EV to ICE as needed.