Rotation period of TOI-179 and CD-56 593A and B vs. (G-K)₀ color (green, cyan, and purple filled circles, respectively), compared to the members of the Pleiades and Praesepe open clusters (Rebull et al. 2016, 2017, plotted as blue diamonds and red squares, respectively) and Group X moving group (Messina et al. 2022, plotted as black circles). Only one photometric period is measured for CD-56 593, spatially unresolved in TESS images, and we are unable to determine to which component it belongs. The data are plotted in the figure for the colors of both components.