Left: Δ_ϖ (top) and scaled to the nominal uncertainties Δ_ϖ (bottom) versus G for the whole sample of clusters. The solid lines show the LOWESS (locally weighted scatterplot smoothing) of the stars bluer (redder) than G_BP − G_RP = 0.9 (blue and red lines), while the black line is for the whole sample. Right: CMD of the whole sample where the colour shows the differential parallax to the median.