Rajdon is an intimidating figure, so it makes perfect sense that it should be colored in a bold way. For its main color, I would go with a dark, slate grey, almost like a storm cloud or metallic paint. The large saddle on its back could be a mixture of brown and black, while its face and underbelly could be a pale beige or off-white. Its horns could be a steel or silver hue, while its sharp claws and teeth could be a stark white to contrast. Finally, its eyes could be a deep, menacing black. Overall, it would create an imposing and intimidating impression!