From my copy of Junkers Ju 87 1936-1945 by Herbert Leonard and Andre Jouineau comes this caption to a profile illustration: "Original German camouflage upper surfaces RLM 70 and 71, lower surfaces RLM 65 [as Wurger stipulates above]. Originally the 96 Gruppo was to have been equipped with the SM.85, a bomber which turned out to be totally unsuitable and was replaced by Ju 87Bs which made up two Gruppi (96 and 97); the machines initially came from German stocks and their nationality markings were as here, washed off (with verde oliva scuro - dark olive green - and grigio azurro chiaro - light sky blue) and replaced those of their new owners. Strangely enough, the Italian Stukas were never painted in desert camouflage schemes and flew in their original colours."
This is confirmed in Regia Aeronautica The Italian Air Force 1923 - 1945: An Operational History by Chris Dunning, which states "The 99 Ju 87s acquired (B-1; B-2/Trop; R-1; R-2) retained their original RLM 70/71 splinter scheme throughout their Italian career."
Italian Stukas were called 'Picchiatelli', or 'Crazy Divers' for a close translation.