I'm glad you have an interest in Chi Omega. I don't know what other sororities you are debating between but please keep an open mind to all of them.
As for the question about you being a minority and joining Chi Omega...I don't see anything wrong with it. Some general things Chi Omega looks for are grades, involvement in the community and school, as well as just clicking with the girls in the house. Skin color, religious background...etc. are not taken into consideration.
So with all that said, good luck and just keep being yourself.
Hootie
PS. Where is it that you are looking to join Chi Omega. Just curious.
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Some follow trends. Others create ledgends.
Zeta Delta Chapter of Chi Omega
http://www.unomaha.edu/~comega