UVJ-selected RQGs with strong absorption lines (in blue) and without strong absorption lines (in red) and their rest-frame UVJ colour uncertainties. Star symbols are galaxies without strong [OII] emission, while squares are galaxies with strong [OII] emission lines. Crosses are galaxies that are not selected as RQG in the UVJ diagram, but with RQG spectral features and their UVJ colour uncertainties. The arrow shows the reddening vector.