I've just bought a wok recently and seasoned it. The only thing i realized at the end is that it never became blue, it's just a dark brown color. Is there a possibility to season it wrong? I've added a few layers of coat with oil, however i have no clue if this can be a health issue on the long run or not. Thanks in advance.
You are probably not using the right oil and/or heating it hot enough.
Might be over the top but I found this video informative: