This coloring page features a detailed depiction of a nuclear submarine. Its body is long and cylindrical, with small windows dotted along the sides near the top. On the rear of the vessel, two large propellers can be seen. The submarine is colored in various shades of gray and silver. To bring the image to life, you could add bright accents of blue for the ocean and shades of green for the seafloor. Add touches of golden yellow to the submarine's outer hull, and use whites and grays to emphasize the details of the propellers. Finally, complete the picture with hints of pink and red on the horizon, creating a stunning underwater scene.