A card body for a data carrier comprises at least a first and a second foil. The first foil comprises a first light-conducting areal region of a light-conducting material and a first opaque areal region of an opaque material adjoining the first light-conducting areal region. The second foil comprises a second light-conducting areal region of a light-conducting material adjacent to a second opaque areal region. The first and second foils are arranged lying one above the other areally. The first and second foils are aligned such that the first and second light-conducting areal regions form an overlap region. The card body comprises a first cover foil configured to be opaque and arranged above the first foil. The transition from the first and second light-conducting areal regions to the first and second opaque areal regions has light-scattering particles.