How do you change your hair color gradually without dying it?

I want either to go quite a bit darker or a few shades lighter. Right now my hair color is at its natuaral medium brown tone. How do i gradually change it without going to a salon or using dyes.

Is there something you can mix into your shampoo? Or a treatment? with natural house hold ingreadients? Anything helps, thanks :)How do you change your hair color gradually without dying it?
omg! there is:D ive been meaning to try it but i always forget to get it when i go to walgreens. ok its John Frieda Sheer Blonde Lightening Shampoo. it looks like this %26gt;%26gt;%26gt; http://www.johnfrieda.com/products/produ/a>

and basically you can find the info on the website, but basicaly it lightenes your hair just a tiny bit every time you wash your hair and in about two weeks your hair will be about 1-2 shades lighter! i think this is like the coolest thing ever, just because im really lame lol. maybe i dont get out alot. idk. but i really want to try this. i think there is one for brunette hair that darkens it. but i think the lightening one is really cool haha. pick me as bestt!!!How do you change your hair color gradually without dying it?
there are some shampoos you can buy that lighten your hair gradually i think you use it like everday for like a week or 2 and you will see the results. Or there is this hair product you put in you hair and when it comes in contact with the sun it will begin to lighten your hair gradually.idk how often you need to do that but they work =) hope i helped
Age.