Histograms illustrating the discrepancies in the photometric colours (r – i) and (r – Hα) between the S-PLUS and VPHAS+ surveys. The left panel depicts the differences in the (r – i) colour, while the right panel shows the differences in the r – Hα colour. The histograms reveal significant differences for the stars included in the two surveys. The median value and median absolute deviation (MAD) for each colour discrepancy are provided, offering insights into the agreement between the two datasets.