Recently, I bought a hair mask "Natur Vital", which dies your hair temporarily and back to your normal hair color in about 10days. It's good for people who got bored of your hair color and want to change your hair color temporarily.
Although I wanted to die my hair to darker normally, I couldn't because I got a hair extension about two weeks ago and I was told that I shouldn't die my hair by a hair stylist. So I died my hair by myself in damageless way. I think it's working. I recommend it to you if you want to change your mood!