experimenting with different hair colors is okay. provided that it suits your skin tone, personality and the mixing and coloring process is done by a professional. Otherwise, the result will turn out just like this:
not quite a desirable sight if you're a middle age man, trying to disguise your graying hair and moustache by dying it in orange. yes, i took this picture in a crowded bus during my way home from work. i think, it would be better if he used black hair color, instead of orange!
that hair disaster might be forgivable but it's definitely not a good sight if you walk around sporting orange-colored moustache!
hmmm..it's been a long long time since i had my hair dyed *pondering*