starinmysky is right
well if you are a beginner then first study about magic and give main focus to grounding, centering, shielding,and energy transfer.
Although you're new so my piece of advice is to stay away from dark arts for a while.
If you have any problem then feel free to mail me but please do include a subject
First of all, as a tip. I wouldn't define magick as a color. Be that color blue,grey,black,white,ect. I would view things as intentions rather than a color. Colors have mutlitudes of meanings and associations.
Second, I would try to get ahold of some reputable books, and read up on some decent articles. Starting maybe with this site, and using a search engine to assist you. Google is great.
As long as you believe that you are a witch and are dedicated enough, then you are. If you haven't already, read up more on what you want to study, and there are even articles on the site that may help you.