This mysterious figure stands atop a rooftop overlooking the city, his face hidden by the hood of his dark cape and cowl, his long cape blowing in the breeze. Two pointy ears stick up from the cowl and a powerful symbol blazes across the sky: the Bat-Signal. To color this courageous hero, I would use a dark navy blue to create the perfect silhouette, then use a lighter blue in shadows and a midnight black along the edges of the cape. For the symbol in the sky, I'd use a bright yellow to really make it stand out. Finally, use a muted gray for the skyline behind him to create a sense of depth.