Remap is the easiest way to get more power, 5 minutes and it will be upto 165-170 bhp with no issues other than possibly the clutch. If it's a 5 speed only a 228mm clutch, 6 speed with the 240mm clutch takes it better. You can limit the torque to help the clutch really depends on how many miles it's done.
Color is interesting, I think I can say that when you come to sell it on you will have limited the amount of available buyers. But then again you only need one person to buy a car.
Karl.