I like you just the way you are (I think that is a song isn't it?) God created you to look the way you do, and I don't think that colourizing your hair will "improve" you any bit.
As for me - I prefer long hair to short hair. Short haired women always turn out looking like little boys - Even Dharma.
Which brings up a question in my mind. What is the difference, if any, between getting a tattoo and colourizing your hair?
-Rob