I would color Giratina with a glossy black for its body, dark brown or navy for its wings with a hint of white to make them look like they are shining. Its eyes would be a fiery red, and the horn would be a pale gray with a hint of silver for an icy effect. This coloring page would be perfect for a night background, so I would use navy blue, black, and a few streaks of light blue that enhance the eerie atmosphere. The shimmery wings and fiery eyes give it a fierce yet majestic look - perfect for a powerful Legendary Pokemon like Giratina!