Scatter plots of the intrinsic properties of SN Ia as a function of their distance from the void centre, normalised by the void radius. The upper panel displays the stretch x₁ and the lower panel displays the colour c of each SN Ia. The black dashed line with filled circle markers corresponds to the median value of the considered intrinsic property as a function of the centroidal (median) r/r_v in each bin. The shaded grey region represents the standard deviation normalised by the count in the bin. The horizontal line displays the median value of the considered intrinsic parameter in this sample. The marker colour indicates the void radius r_v in Mpc h⁻¹ of the nearest neighbouring void to the SN Ia. There are 5, 76, 116, and 64 SNe Ia in the four uniform bins defined with the range r/r_v = [0, 2].