Has any soapers used natural powders for CP/HP. I found this site that use red cabbage for royal purples and others colors for chocolates. There is even a red using beets.
http://www.chocolatecraftkits.com/shop/index.php?main_page=product_info&cPath=74_98&products_id=332
http://www.chocolatecraftkits.com/shop/index.php?main_page=product_info&cPath=74_98&products_id=332