Same as Figure 5 but using the filter system used by Ouchi et al. (2004a) to select LBGs at z ∼ 4 (broad-band filters B, R, i). Filled circles over the black curve indicate colors of LBGs from redshift 3.2 to 3.9. Filled circles over the curve of the low-redshift galaxies indicate colors from redshift 0.0 to 3.0. The dashed line indicates the region used Ouchi et al. (2004a) to select LBGs in their work.