Coloring agents are often used in cosmetics to mimic a pleasant or natural color in the cream or soap. Some colorants are not generally dangerous and can be derived from everyday items. Cumin is a popular spice used to give gold-ish / yellow color to a product. More often than not colorants used in food adn health industry are artificially derived compound. However at Rinica we do not believe in adding color for the sake of color. For instance our anti-aging creams are light-green because of enzymes we use.
Source : https://en.wikipedia.org/wiki/Food_coloring