Color-magnitude diagram from HIPPARCOS measurements (ESA 1997) for stars with parallax precisions better than 14% (in gray), with clear localization of our sample (in orange). The dashed lines represent the selection limits at absolute magnitude M_V < 2.5 (green), and between the lower (red) and higher B − V values at 0.78 and 1.06. The planet host candidates presented in this paper (HD 22532, HD 64121, and HD 69123) are highlighted in red.