As a final note, we have determined the 0-0 energies of the three emissive dyes in solution, as these can be straightforwardly compared between experiment and theory, we obtained the following values: 481 nm (2a), and 495 nm (2b), which is close to the experimental absorption-emission crossing point, with a +14 nm redshift between 2a and 2b, also fitting experiment (+17 nm). These results confirm the robustness of the selected theoretical level.