2MASS colour-colour diagram for the variable stars (red dots) reported by Soszyński et al. (2012) and the 15 BeSC with 2MASS counterpart (blue open circles). The standard sequences from Bessel & Brett (1988) are shown in solid line (main sequence) and in dashed line (giant sequence). The loci of HAeBe stars is represented by the cyan box. Classical Be stars are located in the region near the blue end of the main sequence (Hernández et al. 2005). The arrow represents the reddening vector for 2 mag of visual extinction.