New red dye on already red-dyed hair (naturally brown)

Hi!I'm looking to mak my box-colored red more RED and less auburn or muted. Has anyone had experience with this? I'm looking at Overtone and Good Dye Young. I just don't want to spend money on a dye that won't give me what I want. current colorThanks!! via /r/beautyswatches http://ift.tt/2sRGSHS