Star formation rate as a function of the stellar mass coloured by λ_R. The grey-shaded region in the background corresponds to the 3D-HST sample measurement. The dotted and dashed white lines indicate the star formation main sequence for an age of the Universe of 12.4 Gyr (z = 0.1) and 6.8 Gyr (z = 0.8) given by Eq. (1) of Whitaker et al. (2012), respectively. The colour map is a LOESS-smoothed version of the markers on top. Dots and triangles are seeing and not seeing corrected values, respectively.