Redshift vs. z_P1−z_DE (bottom) and z_DE−y_P1 (top) colors. The solid blue, black, and red lines represent the color tracks of composite quasar spectra from Bañados et al. (2016) and illustrate weak, average, and strong Lyα emission lines, respectively. The dotted lines indicate the color cuts for the [DELS+PS1] selection, as described in Section 2.3. The red circles represent quasars that meet the selection criteria. The sources marked with a yellow cross are newly discovered quasars from this study, while those with a white cross are known quasars for which we present new spectroscopy data. The lower limits correspond to sources that are not detected in z_P1, for which we used their 3σ limiting magnitude. On the right, we show the histograms of the same colors for the L and T dwarfs compiled by Bañados et al. (2016).