Okay I just finally figured this out but I'm just gonna share it in case anyone else is confused. Skins will become the dinosaur's base color. Patterns then determine their marking coloration. For example the Spino it has marks on it's head and sail. The colors wiill differ based on the patterns selected. Sadly we cannot change some markings for the dinosaurs. Though each dinosaur will get a specific and unique marking. Again example the Spinosaurus, it has a distinct white scar/ marking along it's body below the sail. That color will always be white and cannot be changed.
Fun Fact: JPOG Spino will be Sonoran Desert skin. JP3 Spino will be Death Valley skin
Source: https://www.youtube.com/watch?v=VJX70pxuy0s
Fun Fact: JPOG Spino will be Sonoran Desert skin. JP3 Spino will be Death Valley skin