CMD of the companion candidates detected in this work. Over-plotted to known substellar objects (white squares), background stars are represented as yellow stars if identified through proper motion analysis, or as blue circles if recognized via their color. Ambiguous sources are marked as red crosses. The exclusion area (gray) is defined by the two dashed lines. The two promising candidates (from left to right: C1 (HD 24072), C2 (HIP 78663)) are indicated as red dots.