GP Australia F1 2011: Pirelli colours are not well differentiated

At the top of the photo, Nick Heidfeld fits in his Renault R31 the soft compound tyres Pirelli. At the bottom, Vitaly Petrov, with the pneumatic hard. Despite the difference in the range of colors by Pirelli, the difference between the color yellow (soft) and silver (hard) is difficult to see at a glance.
Before that you say that in the photo we see clearly, remember that this is a frozen image, not the reality that we are going to see during training sessions and the race. Pirelli may start thinking about a redesign to improve differentiation, perhaps covering the flanks, in the style of Champ Car with more dye.
But for now, the fan will have problems to find out if a driver uses hard or soft, and if this is a camera on board, forget, Pirelli does not mark the tire on its internal flank as it was Bridgestone. From that perspective, it is impossible to know if it is mounted a compound or another.