There's really no way for anyone to tell you one way or the other man. Heroin can be either white, brown, tan and anywhere in between, but color is no safe indication of the content of your drugs. For instance, lighter colored or white dope in my area typically means the dope has been cut with or is Fentanyl.
I'm gonna close this, as like I said, there's really no way for us to accurately answer the question.