I didn't find clear information. Maybe here on CP someone can answer the question. Is known which colors were delivered as often? Thank you very much for feedback.
I use to own one which came out of factory as Rosso Chiaro 20-R-190 I wish you luck in your project, this is going to require a lot of work to compile this data.
They built 387, 85 of them in RHD ...but no information about colors. Maybe I'm to stupid to find something about the delivered colors.
In my opinion, delivered colours is a good thing, as it was done e.g. for the F50. For the 365 GT4 BB the data is with Ferrari (as production data) and also with individual owners when they have the paperwork, so that is why I doubt it can be accessed easily to cover the 387 cars and to build the resulting delivered colors list.