Grätzel solar cells (DSSCs) represent a promising technology for converting solar energy into electrical energy. A key component of such cells is the dye, which plays a crucial role in absorbing photons and generating photoelectrons. The efficiency of the cells directly depends on the optical and dielectric properties of the dye molecules, which determine the processes of light absorption, charge transfer, and recombination. In recent years, significant attention has been paid to the study of natural dyes, such as anthocyanins, which exhibit high light absorption capabilities in the visible spectrum and are environmentally friendly. This article presents the results of modeling the optical and dielectric properties of dye molecules used in Grätzel solar cells. Special attention is given to the accurate determination of dye parameters and the analysis of their influence on the key characteristics of the cell. The obtained data provide deeper insights into the mechanisms of DSSC operation and suggest ways to improve their efficiency by optimizing the properties of the dye and its interaction with other components of the system. #CSOC1120.