Color–color diagram of NUV − r against g − r comparing the distributions of the mock (black dots) and a real SDSS (red contours) galaxy sample. We see general agreement between the two galaxy samples for almost the entire range of these colors especially for (g − r) ∼ 0.6. Photometric bands from GALEX (NUV) and the SDSS survey (g and r). We also show a sample of photometrically selected passive galaxies (green contours) for comparison. The mock data were artificially augmented with noise to achieve an S/N of 10 to match to the selection criteria for the SDSS and GALEX bands. Contour levels denote the 10th, 25th, 50th, 75th, and 90th percentiles for each population.