g − i color–mass distributions of the three different target classes utilized in this paper. The color contours represent the CMASS galaxy sample, with color representing density of points in each cell. The black curves represent the density contours of SPARSE targets. The WISE targets are sparse enough that they can be shown individually, represented by the filled circles. All results are shown in the redshift range of ﹩z=[0.45,0.60]﹩.