Decorating in a nautical theme can be as simple as adding a few seashells and a picture of a beach. However, it can also be as entailed as using beach inspired wall paper on the walls and nautical decorating elements such as pillows and curtains. What is commonly seen in nautical themes; Colors such as blue, white, or sand-brown. Nautical symbols such as anchors, compasses, ropes, seashells and ships. Natural materials such as rope and wood. Stripes in red, white or blue.