Which Brillant Brunette is Darkest? chestnut to espresso or amber to maple?

is there any other product that darkens hair? I have auburn hair and want to darken it without dying..

Which Brillant Brunette is Darkest? chestnut to espresso or amber to maple?
espresso will most likely be the darkest
Reply:The chestnut to espresso one is darker.
Reply:The chestnut to espresso is the darkest. I have used the amber to maple and it gave my hair a brown/reddish tint. (I have naturally dark blonde hair.) I am going next week to add lowlights which will darken my hair but won't require as much maintenance.