|Cheap natural coffee hair dye|
Of course, it stains your pearly white teeth, so it must stain grey hairs!
Mix up some instant coffee (I used decaf since I don't drink it often) with some conditioner to make cheap hair dye. Apply it to your hair and let it sit for about an hour. I put a shower cap on my head for the hour to keep my head warm. Also, that helps your hair become extra conditioned - it's a two-for-one punch!
You need to repeat this kind of dye more regularly but that depends also on how often you wash your hair. You may need to do it once a week or so, but considering how cheap it is, it could be worth it.
On the plus side, it is the best smelling hair dye I have ever used and there are no toxic chemicals to worry about. This is a great option for pregnant people or those sensitive to chemicals.
It's also a nice idea if you just want to try going brunette, but aren't sure you want to commit to something permanent, or for teenagers to experiment with a short term look.