I've used the basic colorants that you can find in most craft stores and online at places like craftsetc.com. They seem to do really well but the choices are limited. I am in need of brown and black and am having a hard time trying to find liquid forms of both. I'm leary of the powdered forms only because I've read they are harder to use and I'm still so new to soap making. If anyone knows of great brown and black liquid colorants I'd be grateful for the info!