This coloring page is both beautiful and haunting. The blue lagoon stretches out in front of the two small children. The boy is wearing a blue shirt and the girl is wearing a white dress, their white hair and blue eyes making them look even more scared than they already are. To bring out the depth and beauty of the picture, I would keep the main colors consistent so that only the details and deeper shadows stand out. I would create a soft, calming blue hue for the background, while making the children's clothing and the details around the lagoon more brightly colored. Using warm, vibrant colors will give the picture a greater dimension and will allow the details to stand out. By adding in some splashes of vibrant yellow and green, the picture could truly come alive and give the illusion of a real escape from reality.