You don't need to know a thing about airplanes to mix paint. Go to google images and type in the color you want. It will display samples of that color. From there, you should be able to mix your color by eye. For example, Blue + Yellow=Green. Shade of Green? Adjust the Blue/Yellow ratio. Lighten or darken with Black, white, or, even shades of gray. All you really need for non metallic colors are the 3 primary colors plus black and white. I apologize in advance if I'm "talking down" to you. That was never my thought or intent. BTW...On google images as a color source suggestion, I googled: Zinc Chromate, US Interior Green, Blue Aotake, Magnesium Alloy, Panzer Gray, RAF Greenish Gray Matt, Ferrari Red, and, Radome Tan to get a well rounded selection. I got usable samples of any color I typed in.
Good luck and Good hunting
Ray