Patent ID: 7303292

Claim:
A hue variable retroreflective sheet comprising: a surface layer composed of at least one layer; and a plurality of retroreflective elements that are positioned beneath the surface layer, wherein the retroreflective element retroreflects incident light toward a light source direction, at least one layer of the surface layer is an optical coherent layer that changes in color depending on a point of view and in which an optical coherent coloring material with a core material having a surface that is covered with one or more substantially transparent coating layer is added to be dispersed, and mirror-reflects the incident light toward a direction opposite to the light source side, at least one layer of the retroreflective sheet is a colored layer containing a coloring material that colors retroreflected light, a total visible light transmittance of the optical coherent layer is higher than a total visible light transmittance of the colored layer, and the retroreflected light and the mirror-reflected light provide different hues.