Effect of residual background flux and blending probability on the corrected BP and RP flux excess. Top panel: distribution of corrected BP and RP flux excess vs. G_BP −G_RP colour for a subset of nearby sources fainter than 17 in G-band. The symbols are colour coded by the source median residual background as measured from the BP spectra. Bottom panel: distribution of corrected BP and RP flux excess vs. G_BP −G_RP colour for the same sources shown in the top panel but colour-coded by blend probability (see text for details). For these plots sources have been further selected to retain sources where the blend probability for BP and RP was in agreement to within 50%.