Need help in choosing contacts color!!!?!

Question: i'm 15 years old and i'm chinese. i hav medium skin, blue black hair, and very very dard brown eyes. i was thinking of either brown, grey, or black contacts. anyone have any suggestions of what color i should get? here are sum pictures of chinese wearing those 3 colors. HELP ME I CANT DECIDE!!!

grey:
http://www15.babidou.com/pic/2007/12/8/e...
http://www15.babidou.com/pic/2007/12/8/e...

brown:
http://www15.babidou.com/pic/2007/12/8/e...
http://www15.babidou.com/pic/2007/12/8/e...
http://www15.babidou.com/pic/2007/12/8/e...
http://www15.babidou.com/pic/2007/12/8/e...

brown:
http://www15.babidou.com/pic/2007/12/8/e...
http://www15.babidou.com/pic/2007/12/8/e...

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