The present invention provides: a white pigment comprising a zeolitic imidazolate framework (ZIF)-based powder in which zinc (Zn) and an imidazole-based organic matter are bonded; a polymer resin film containing the white pigment; and a method for changing the color of a medium using the white pigment. It is an object of the present invention to provide the white pigment which uses materials decomposable under conditions inside a respirator as the white pigment to be non-toxic and safe even during inhalation.