Position of WR stars and candidates in the 2MASS colorcolor diagram. Solid black lines define the near-IR region of WR stars (Mauerhan et al. 2011). Upper panel: sources identified as WR stars by the Gaia ESP-ELS algorithm (filled symbols) divided into several groups based on the analysis presented in this paper (see the main text): previously known Galactic WC (GWC+; light blue triangles) and WN stars (GWN+; dark blue triangles), known WR stars in the Magellanic Clouds (MWR; purple triangles), our selected candidates (Cand; red star symbols), and the remaining objects with known (Ookn; green circles) and unknown nature in the SIMBAD database (Ooun; yellow circles). Known WR and [WR] stars not classified by the algorithm are shown as empty markers: known Galactic WC (GWC-; light blue triangles) and WN (GWN-; dark blue triangles) stars and [WR] CSPNe ([PN]; pink circles). Bottom panel: position of the sources identified as WR stars by the Gaia ESP-ELS algorithm, color-coded by the quality flag. The lower the value of the flag, the higher the probability that the source is a WR star.