Metropolis colorized? This is news to me. Are you sure you don't mean the color tints Giorgio Moroder used for his 1984 restoration? Tinting is a technique that's been around since movies were invented.

If tinted is the correct terminology, i'll go with it. but if the original was black and white and the '84 was some tinted color, you can hopefully see why i'd used the colorization term. Yes it's off, but the point was it wasn't the original presentation.

(not a great argument coming up)

Having problems finding a real comparison, but if these images are close to the remake, you maybe could see the recolored point.

(NOTE : this is a 'recreation' of the '84 with comparison to the original)