Aetna Blue
Market Find: 2019 Audi exclusive Aetna Blue S5 Sportback
Believed to be identical to Porsche Aetna Blue that dates back to the 356 era, a quick Googling will show that Audi exclusive has built a small number of cars in this color over the last few years. The owner/seller of this car reports, in this case, it is 1 of 1 and thus apparently the only 2019 Audi S5 Sportback built to this color... at least in this year.