Wella Koleston Color Intense 303-4 Dark Chestnut is a hair color product designed for hair colouring applications. The Dark Chestnut shade, identified by code 303-4, is part of the Koleston Color Intense range from Wella. It is suitable for personal or professional salon use and can be incorporated into a regular hair colouring routine. This description is based solely on the product information provided without assuming additional features or performance claims.