Wow.... I dreamt about a blue snake biting me last night. I didn't even know blue snakes existed.
The key to deciphering a dream is not so much about the details of the objects and happenings in the dream but more how you felt about them. If you felt the snake was betraying you by biting maybe you're feeling spited by someone in your life who is acting cold blooded. If you were happy the snake bit you then you are feeling infused by something in you life. If you were just okay with it then maybe something dramatic is happening but you are able to cope and stay strong to get though it. If you were scared of the snake you may be awaiting some unpleasant task you must undertake. It's all very open to interpretation.