The CCD, upper left panel, and the CMDs for (B − V), upper right panel, for (U − B), lower left panel, and for (V − I), lower right panel, of all observed stars. Solid line in the CCD is the Schmidt-Kaler (1982) intrinsic line. Dashed lines in the CCD mean the path of the reddening for a B5- and an A0-type star as indicated by the labels. The bluish region represents the location of nearby dwarf stars; the yellowish one points out the locus occupied by A-F-type stars affected by increasing reddening. Stars above the B5 reddening line are young stars (see text), except those ones for which no reddening solution is possible.