A coloring structure for generating a color having a wave length in an area of a visible light by reflecting and interfering actions of a natural light includes first substance layers having an optical refractive index of n.sub.a and second substance layers having an optical refractive index of n.sub.b. The second layers overlie respective first layers in an alternating arrangement of the first and second layers. In order to generate a brilliant color by the reflecting and interfering actions, the optical refractive indexes n.sub.a and n.sub.b are established to satisfy both of relationships "1.3.ltoreq.n.sub.a " and "1.1.ltoreq.n.sub.b /n.sub.a .ltoreq.1.4". The coloring structure may contain a fluorescent pigment.