Upper plots: Distribution of the specific star formation rate and colour as a function of galaxy stellar masses for galaxy members in systems. Lower plots: Distribution of the fraction of red and quenched galaxies in systems as a function of their dimensionless crossing time. In all panels, dots represent the median values per bin, and the error bars are the 95% confidence interval for the median. The solid lines show the polynomial fitting to the scatter plot with the LOESS method, and the grey region shows the 95% confidence interval. In each column, the comparison is made between CGs (green) and their control sample (red). Each sample has V_lim = 500 km s⁻¹.