Not sure about the purple...
Anyway, interesting take on the modesty panel. Much like Sauber, they've chosen to stick with the step, and just improve the airflow around the transition. Sauber have chosen to "fence" the side of their nose, so the airflow doesn't spill over. Red Bull have chosen to do the opposite. My guess would be neither team wanted the additional weight of a full modesty panel, which would be very high and very far forward. That or this is actually more efficient than a flat nose... I would find that hard to believe.
"Unbelievable how silly this Formula 1 is these days, with this stupid overtakes."
—Sebastian Vettel, 2012 US GP