TFR for the sample of high-quality cluster galaxies, separated into dusty red galaxies (red stars) and blue cloud galaxies (blue squares). The black line indicates the best-fit bisector regression line for the whole cluster sample. Fixing the slope to this value, the red dash-dotted and blue dashed lines depict the corresponding best-fit lines for dusty reds and blue clouds, respectively. B-band (left panel): for a given velocity, dusty red galaxies are on average fainter than blue cloud galaxies. Stellar mass (right panel): the difference between the average residuals of dusty red and blue cloud galaxies is not significant (ΔM_∗ = 0.06 ± 0.05).