Natural coloration using herbs for cold process soap has been popular recently and seems to be the latest trend. I'm disappointed to say that not all natural colorants hold up to the test in time. Just look at my Dark Star soap before and after shots. I used Turmeric powder for that golden yellow, cocoa powder for brown and activated charcoal for black. While cocoa powder and activated charcoal hold up to it's strength in color, the golden yellow is now totally gone. And it has only been about 4 weeks out. Is there a way to achieve that rich golden yellow by using natural colorant? I would LOVE to know.