Mornin' Ron, A 'Tall order'!
As far as I know there ain't no such animal!
How could there be? Each shipping company has there own ideas and 'House' colours. Colours may also change during the ships working life, e.g. if it is sold on to another shipping line.
Best you can do is Wiki the ship you are model
If it is still in service you should find it on the various Maritime Tracking sites (try www.marinetraffic.com and search the ship's name) or relevant Shipping Company site. if you know the company name Google that. Good luck, cheers, Doug 😎