Choose beige or cream sheets for your mahogany bed. These colors will balance the dark color of the mahogany and allow you to experiment with more interesting comforters.
Use a dark brown bed skirt or fitted sheet to conceal your box spring. These items can be somewhat unsightly, and the dark brown bed skirt will blend the box spring in with the mahogany bed frame.
Choose a comforter that matches the overall theme of your bedroom. For a more traditional look, choose a down comforter that uses red, gold or green. For a more experimental look, go with a comforter that uses a plaid pattern.
Vary your pillow sizes to add dimension and diversity to your bed. Choose two silk pillowcases that match the comforter for your main pillows.