Hi I found this site while doing a Google search for changing dark hair lighter. I found a lot of helpful info but am not sure what to do in my particular case.
I have very dark brown dyed hair with blond on top and blond underneath. I have been dying my hair dark brown and blond for 3 years. I really want to change my dark brown hair to a warm medium brown. Today after reading some of the suggestions on here I took a sample of my hair and mixed shampoo with 20% peroxide and it did absolutely nothing. I took another sample and mixed clairol blondest blond ( which I use for my blond part ) with 30% peroxide and it did nothing. I am now thinking of trying color oops but I am wondering if that too won't work as my hair seems to be very porous as the majority of it is grey and I have used a straightening iron which probably hasn't helped. I only want to re do the dark brown as I am happy with the blond so I would try and keep the color oops off it by using vaseline.
Also if I need to re dye my hair after using color oops what color should I use to get warm medium brown? As from what I have read a lot of you have had to use much lighter colors as it can turn back dark brown and I would hate to be back where I started.
I would really appreciate any advice.
Thanks
:)

You can't dye your hair lighter without using a lightening product of some kind. If you want to go 1-2 shades lighter, you can select your desired hair color and mix with a 20-volume peroxide developer in equal parts. Since your hair is dark, you might end up with brassy tones in your hair. I suggest using an ash-base color such as medium ash brown. This will help reduce the brassy tones.

Pretty Lady,
Thank you so much for your reply but I did mix Clairol's blondest blond with 30% peroxide on a strand test and it didn't shift the color one bit. Do you still think that mixing medium ash brown with 20% would? My hair is dyed a very dark brown and I am really fed up with it as it is too harsh.