Batman is ready to take on the night in his iconic black and grey costume, with the yellow shine of his bat emblem catching the moonlight. He stands on a rooftop, surveying the cityscape in the darkness. His eyes, piercing the shadows, glow white. A black cape behind him completes the picture. To make this image come alive, you could choose to use a bold palette of grays, blacks and yellows to represent the nocturnal aura of the city. The bat emblem could be colored a bright yellow-gold, to show the brightness of the hero's symbol against the bleak night. The whites of his eyes could be a stark white contrast, a reminder that Batman is ever vigilant.