These two blue and white dragon-like Pokémon each have an antler-like horns on top of their small heads and long necks. Their long, fin-like wings are a stunning feature, with Latias possessing a brilliant red gem on its chest and Latios adorned with a shimmering blue gem on its forehead. They have a long tail with a red or blue tip at its end, making for a beautiful contrast of colors. To bring out the best in this image, I would use a range of colors to emphasize the details in the pair, from bright blues and whites for the Pokémon themselves to bold reds and blues for the gems and tailtip. Darker colors can also be used to shade in the intricate creases in the wings to create a 3-D effect. This color scheme would not only be attention-grabbing, but also bring out the unique qualities of these mythical creatures.