Hertzsprung-Russel diagram showing the evolution of the solar models. The models using MLT and the 1KM are shown in thin light blue and light pink lines for comparison. The different treatment of the outer layers for the models with 3KM results in higher (Case A: purple) and lower (fully non-local: green; Case B: turquoise; Case C: orange) effective temperatures on the RGB compared to MLT and 1KM.