The colour is Magma red..the car is available is three colours specifically for this centenary edition...White, red or blue...
This is what Maserati say...
The special three-layer paint finishes includes Magma red and Inchiostro blue, two colours that emphasise the sporting nature of the more extreme MC versions of the GranTurismo and GranCabrio. These two colours are a modern interpretation of those of the Maserati shield and also represent the traditional colours of the town of Bologna where the company was founded in 1914.