Distribution of rest-frame U−V color of the initial sample of VIPERS galaxies (in gray), the passive galaxy sample defined solely on the basis of U−V color (in blue), and the final ETG sample (in red) in different redshift bins in the range of 0.4 < z < 1.0 as labeled in each panel. The separation of red, passive galaxies from blue late-type galaxies was defined by an evolving cut in the U−V color distribution (Fritz et al. 2014). Colors are given in the Vega system.