HRDs for all 296 SYCLIST cluster simulations at each metallicity considered: Z = 0.014 (left), Z = 0.006 (middle), and Z = 0.002 (right). The colour scale indicates the initial mass of the star, from the least (blue) to the most massive ones (yellow). Overlaid in black are the IS boundaries determined by A16 for the second+third crossings averaged together (solid) and first crossing (dashed). Red dashed lines show the cut applied to exclude most of the first-crossing stars.