There are a lot of darker BP morphs out there. Before you pull the trigger on the normal I would suggest looking at some pics and then if you see some you like try and find a more local source. Some people prefer normals over any morphs but I'd recommend at least looking to make the choice for you, a Mojave comes to mind as a darker morph but there are a lot more. Keep in mind that most BPs darken with age as well and lose a lot of colour.