Unreddened (BP − RP), M_G colour-absolute magnitudes for the BLAPs, as identified by Pietrukowicz et al. (2017), are shown as red points, and the dereddened colour-absolute magnitudes are shown in black where the errors reflect the uncertainty on the distance and (BP − RP) colour, with an additional 20 percent uncertainty on the extinction. The background shows the density of stars in the (BP − RP), M_G plane of stars within 150 pc, which are assumed not to be significantly affected by reddening.