If your white and a blood member when you go to prison are still a blood in prison?

If you are asking for the groups, the Bloods versus the Crips, then you would still be a Blood. It all depends on what you're leader(s) choice of action on you. He/she could kick you out at anytime. You can call someone you know that is a Blood to ask the leader, and then visit you to tell you the information, but it is no one's ability to say outside of the gang.