I'm just now getting started on how to make soap. I'm having trouble finding what I exactly need to color the soap. I bought some colorants at Hobby Lobby and they don't work very well I made me a mold and I was trying to make like an Oreo cookie I put cocoa powder in it and it was a rich dark chocolate a perfect color but as it set and cured it turned to a light tan brown color. Does anyone have any advice on what I can use to make a dark dark creamy chocolate brown. And where is the best website to order supplies?