For best results to achieve 5M (Light Mahogany Chestnut) on uncolored hair apply on 5N - Light Chestnut color hair. If applied on 3N, 4N, the color result will be dark mahogany chestnut. If applied on 6N, 7N, 8N, the color will be light mahogany. The same rules will apply for 5D and 5R (color will be very cold and flat - the Ash series is used to neutralise unwanted gold and red). To cover grey hair with 5M it is essential to mix appropriate quantity of 5N Light Chestnut.
See instruction on leaflet inside the color box or refer to 5N Light Chestnut.