There aren't any. You can make the ships whatever color you choose. Heck you can even make them have multiple colors if you want. Mine is purple thanks to the Jem'hadar shields :p
Was referring to the defaults when you first get them - in the screenshots it shows the Science Odyssey with a blue-green pattern on the hull, the Operations Odyssey with a sort of yellowish pattern and the Tactical Odyssey with a red pattern.
I want to know the color codes used for those patterns.