How many colours are available in BMW M Series?

BMW M3 Sedan comes in six colours -  Mineral White, Alpine White, Silvertone, Yas Marina Blue, Black Sapphire and Austin Yellow. However, M4 Coupe is available in following six exclusive shades - Austin Yellow, Sakhir Orange, Black Sapphire, Silverstone, Yas Marina Blue and Alpine White. BMW offers 8 colours in M5 sedan i.e. Black Sapphire, Alpine White, Silvertone, Monte Carlo Blue Metallic, Space Grey, Imperial Blue Brilliant Effect, Singapore Grey and Sakhir Orange, whereas the colours of M6 Gran Coupe includes Singapore Grey, Sakhir Orange, Space Grey, San Marino Blue, Black Sapphire, Alpine white, Silvertone, Imperial Blue Brilliant Effect and Havana.