Model paints for Revell Saturn V 1/96 Model rockets

Sounds like you are painting it as the box and insrtuctions recommend. Try going to Apollo Maniacs on the web. Has good information and examples of more realistic paint schemes and links to numerous apollo and scale modeling websites.

I would think a "normal" green, a light gray and a bright red would fit those descriptions.

Or, you could check out the resources here:
http://www.apollosaturn.com/modeling/modelman.htm