Paint the bathroom walls a natural color, such as tan, brown, cream, leaf green, forest green or even sky blue. Rustic decor mimics the colors found in nature, so vibrant, artificial colors won't convey a cabin-like feeling.
Replace bathroom fixtures with cabin-inspired ones. Remove shiny silver towel racks and toilet paper holders, and replace them with brass, bronze or pewter varieties. Choose styles that appear antique rather than those with sleek, modern lines. Look for molded fixtures in rustic shapes, such as antlers and pieces of wood.
Add bathroom linens and fabrics that reflect a traditional cabin theme, typically an outdoor or nature motif. Look for cabin design themes that include black bears, moose, deer, ducks, pine trees, fly fishing gear, fish or snow-capped mountains. Select a shower curtain, shower hooks, bath mats and towels that fit the cabin style and your bathroom's color scheme.
Bring in accessories with a rustic design. Look for complete sets that include a soap dispenser, soap dish, tissue box, garbage can and toothbrush holder. These can be solid colors that complement the wall paint or feature a print or motif that accents the more dominant motif, such as pine cones, birds, leaves or stars. Accessories that match will bring the overall design of the bathroom together.
Place a pine-scented air freshener in the bathroom to complete the cabin look and feel. Other natural scents that complement a rustic decor include cinnamon, citrus and vanilla.