Comparison of Geneva stellar evolutionary tracks (solid black lines: non-rotating; dotted black lines: v/v_crit = 0.4) with Padova tracks (Bertelli et al. 2008, solid cyan lines), and tracks by Castellani et al. (1992, solid red lines) and Lagarde et al. (2012, solid green lines = non-rotating; dotted green lines = v/v_crit = 0.3. The instability strips by Bono et al. (2000b, wedge-shaped dark blue solid lines) and Tammann et al. (2003, gray shaded area) are also included.