A retroreflection sheet comprising a surface layer (1) consisting of at least one layer, and a plurality of retroreflective elements (3, 4, 5) positioned below it, wherein the retroreflective elements (3, 4, 5) retroreflect an incident light in a light source direction; at least one layer in the surface layer (1) is a light interfering layer that has its tone changed depending on a viewpoint, has its core material surface covered with at least one layer of substantially transparent coating layer, and has light interfering color material dispersed and added thereto, and mirror-reflects an incident light in a direction opposite to the light source; at least one layer of the retroreflection sheet is a colored layer containing a coloring material coloring a retroreflection light; and a retroreflection light and a mirror-reflection light develop different hues, whereby different hues in at least two colors are developed by light interference in daylight, and a retroreflection light develops a color different from that by a hue in daylight by means of night-time light projection to further develop a color different from that of the retroreflection light on a side opposite to an incident light. ® KIPO & WIPO 2007
HUE VARIABLE RETROREFLECTIVE SHEET