Convective velocities in the HRD interpolated from MESA models for continuous representation. Top to bottom: Metallicity Z = 0.006 and 0.014. Left to right: Convective velocities in the regions of iron and helium opacity bumps. Evolutionary tracks that were used for the interpolation are shown in each panel. Coloured circles show observed macroturbulent velocities measured in this work, triangles those measured in Simón-Díaz et al. (2017).