The following questions were answered by paleontologist Don Lessem . All dinosaurs we know of had scaly skin with pimply patterns, a lot like alligator handbags.
Chances are they came in many colors.
Their ancestors, reptiles, can be colorful, and their descendants, birds, are very colorful. Dinosaurs lived in many different environments and it was probably in their interest to be colored to blend into those environments to hide from hunters. For instance, little plant-eating dinosaurs that lived in the sandy Gobi Desert of Mongolia might have been tan colored to blend into the background so velociraptors would have a harder time finding and eating them. Dinosaurs in the forests might have been green and brown. We don't know if dinosaurs had ears, since soft tissue isn't preserved as fossils.