Colour–magnitude diagram for 61 DP/MaNGA galaxies (the eight others do not have a NUV − r colour measurement). Here, M_r is the r-band absolute magnitude. The colour NUV − r is taken from the RCSED catalogue and is K- and Galactic extinction-corrected (Chilingarian et al. 2017). Top panel: apparent NUV − r colour. The green dashed lines show the green valley definition as in Salim (2014). Bottom panel: NUV − r colour corrected for dust attenuation. In both panels, the contours represent the 7351 galaxies from the MaNGA DR17 with a NUV − r colour measurement in the RCSED catalogue. The shaded green dashed lines refer to the green valley definition as in Salim (2014), while the other dashed lines show our green valley definition after dust attenuation correction.