The two tanks stand side by side, creating a striking contrast against the white background. The tanks stand tall with their smooth metal surfaces and pleasingly curved domes. The ladder leading up to the top of one of the tanks draws the eye and provides a dynamic focal point. Color the tanks in a cool gray tone, allowing hints of contrasting shades to give the metal its authentic metallic look. For the ladder, choose a rustic red finish that stands out from the gray and complements the overall color palette. Finally, for the space between the tanks, choose a light blue to bring texture and depth to the design.