Mahogany is a light brown color if left not whole. Well, you can use a wine thermometer that attaches for the bottle. Will your cellar be in the interior of the home and is it adjacent to an out of doors wall? This famous Loire wine made out of Sauvignon Blanc grapes puns a famous wine site. https://md.entropia.de/ZfX4JQ-LSKKmXve-2RC7SQ/