Mahogany The mahogany Portobello and Legacy Series is a stunning design series of traditional, exquisite doors. Mahogany is a red-brown hardwood used primarily for only the highest grade of wood doors. Mahogany will vary from rich golden to deep red-brown colors and has a beautiful finish when stained and sealed. Knotty Alder The knotty alder EstanciaR Series is a charming rustic design series of beautiful and desirable doors. Knotty alder is an American hardwood, growing in the west from California to northern Alaska. Knotty alder offers a beautiful “closed pore” grain and has a beautiful finish when stained and sealed.