Gaia DR3 colour-magnitude diagram of high-priority (blue plus signs) and low-priority (green crosses) DR3 HVS candidates. The blue and green histograms on the right illustrate the respective absolute magnitude distributions. The region occupied by nearby WDs (Hollands et al. 2018) is bounded by dashed lines, that of hot D⁶ stars (El-Badry et al. 2023) by cyan dotted lines. The cyan lozenges show S5-HVS1 (Koposov et al. 2020), not included in this study, with its predicted and measured absolute magnitudes (see text). The magenta symbols and labelled objects are as in Figs. 1–4. Two more D⁶ stars from Shen et al. (2018), D6-1 and D6-3, and six other relatively blue stars (A–F) are also labelled. The vtan_g of the latter six stars are listed in the inset (see also text).