Temperature extent of the blue loop across mass (vertical axis in each panel), metallicity (horizontal axis in each panel), and overshooting scenarios (rows and columns). The extent of MS core overshooting increases in rows, while the extent of envelope overshooting increases in columns. In a single panel, overshooting parameters are fixed and the color of each square codes the effective temperature of the tip of the blue loop for models of different M/Z. In case the loop enters the hot IS, a black frame is drawn around the square.