Just like people, different dinosaurs had different skin colors! Of course, there are no pictures of dinosaurs that let us see exactly what they looked like, but paleontologists (the scientists who get to study old fossils!) have a pretty good idea of the colors that different dinosaurs wore.
Recently they discovered that some dinosaurs had chestnut color tails with white stripes. Dinosaurs like the stegosaurus, who had thick armor that protected them, wore bright colors to warn away predators.
On the other hand, dinosaurs who needed protection from predators had light bellies that made their shadows smaller, or they had strange color patterns that helped them blend in with plants!
Gosh, it would sure be fun if people could do the same thing!