The basic UV and optical properties of the HRS. Top row: the NUV (left) and FUV (right) magnitude distribution. The solid line shows the local GALEX UV luminosity function presented by Wyder et al. (2005). Middle row: g − i (left) and NUV − i (right) colour vs. stellar mass relations. Bottom row: FUV − i (left) and FUV − NUV (right) colour vs. stellar mass relations. Colours are corrected for Galactic extinction only. Galaxies are colour-coded accordingly to their morphological type: red triangles are E-dE, purple squares S0-S0a, green pentagons Sa-Sab and black circles Sb and later types.