RUBIES spectra at 2<z_prism<5 and with median continuum S/N>1, sorted by rest-frame U−V colour (spectra normalised by the median flux between rest-frame 0.51−0.64 μm). The bluest sources show the strongest emission lines, while the Balmer break becomes more prominent for redder sources. For the very reddest sources (near the top) there is a diversity in spectral shapes and visible emission lines, with a mixture of dusty galaxies, quiescent galaxies and red AGNs.