Well, one of the few times the COncorde was in Italy, he was with the Pepsi Colors

Yes, but BAC-Aerospatiale said to color Concordes only with light colors, for not over-heat the plane at supersonic speeds.
In fact the Pepsi Cocnorde has a limitated speed, that normal Concordes
And that's why BA COncordes had the blue belly that other BA palnes have.