Fraction of red ((u^∗ − g′) ≥ 1.1, left panel) and blue ((u^∗ − g′) ≤ 0.55, right panel) galaxies as a function of redshift for different luminosity thresholds. Lines are for VVDS data, triangles for Omocks, and squares for Cmocks. The colour/thickness code is the following: from magenta/thin to blue/thick we consider galaxies with (M_B − 5log h) ≤  −19.0,    −19.5,    −20.0,    −20.5,    −21.0. Each triangle(/square) represents the mean value of all Omocks(/Cmocks).