There's also the real-life and appearance considerations.
You can opt for the paint scheme as used directly on TMP ship model. That would be accurate.
Then there's the appearance it had in the film, which was greatly affected by studio lighting effects and camera work and all that.
Some might want to achieve, as close as possible, the look of the film. That look went beyond just a paint job.
So you gotta weigh your own factors and preferences.