Android Monitor - What does purple colour mean

Have updated to Android monitor 4.3 and the battery line at the bottom of the screen now has a purple bit as well as dark blue and light blue. What does the purple bit mean?

alan_johnston
I think I migth have worked it out.
Dark blue is current battery SOC and purple is where SOC will be at the time indicated (41%)

Is that right?

alan_johnston Yes - so you get a visual of where the battery is likely to end up at by the next charging period