Soy milk is one of the raw material choices in making kefir. Soy milk kefir has a white color so it is necessary to add coloring to increase the attractiveness of kefirproducts. Oneof thesources of natural coloringthat can beutilized is butterfly pea flowers which contain anthocyanins. The purpose of this research was to obtain the best ratio of butterfly pea flower extract in makin soymilk kef…