Observed g − i color distribution of the sample after redistributing the galaxies within their uncertainties. The solid red and blue lines show the UDGs and diffuse galaxies, respectively, along with their median values (given at the top-right corner), marked as the dotted vertical lines. Sources with only upper limits on the color are removed from this distribution. The vertical dashed black line marks the separation of red and blue LSBs from Tanoglidis et al. (2021).