I mixed some coffee and vanilla extract with my conditioner once when I was a teenager. I think I got the idea from a teen magazine and was aiming to darken my hair. Can't remember if it worked or not, I think if it had worked...then I would remember that it did, so I'm guessing it didn't.
Originally Posted by westcoastwaves
I've used a coffee rinse, it does work, but you have to keep using it, it's a very gradual color change. Very handy if you need to darken a bad dye job.