I'd like to try shea butter in my CP soap but there are so many options! Do I want refined or unrefined and yellow or ivory, ect. I can get organic raw shea butter locally but it's very yellow. The brand is RA Cosmetics and the shop owner says sometimes it's yellow and other times it's lighter ivory colored. He's not really sure why except maybe the color difference is a seasonal thing. Will someone please point me in the right direction?