To color this image, begin with the brick wall and the fire escape. Start by using dark red, orange and yellow hues to give the impression of a bright setting. Next, add the details to the two superhero suits. For Iron Man's suit, use bright reds, golds and blues. For Spider-Man's suit, use black and whites mixed with red and gold accents. Finally, for the background, use darker colors for the buildings, such as grays and blues, to add a contrast and a sense of depth. After coloring, your work will come to life, showing the heroes in their shining suits ready to battle evil.