Silver's the best choice here. Except for Tornado Red all the other colors make the car all but unsellable.
My brother has a Matchstick GTI and the color, while nice and different, ain't too popular. My wholesale buddies say its too weird to be in demand.
Dealers will call that Indigo "no sale blue".
Green is like the color of Kermit the Turbo Pickle. Cute if you're a 16 yr old girl.
Silver is the one to go with.