Color-period diagram for some well-known wide binaries in the literature. These are shown in red and labeled individually (see Sect. 4.4 and Table 3.) Open cluster sequences are overplotted together with a selection of wide binaries that follow comparable behaviors (where available) with the well-known ones. The inset shows the position of alf Cen C, which extends far beyond all other systems discussed in this work. As before, open symbols denote doubles (i.e., wide binary components that are themselves binaries).