The color locus for several filter combinations defined in term of ﹩i-J﹩ color. In each panel, the stellar locus from Davenport et al. (2014) is shown (blue points) in addition to the density of BUD stars (grayscale pixels) and the mean and dispersion of the ultracool dwarf locus (red points). Offsets between the two datasets are primarily due to the small numbers in the reddest bins of the Davenport et al. color sample; the ﹩{{K}_{S}}-W1﹩ color for those bins also suffers a slight bias toward redder objects due to the deeper photometric limit of ﹩W1﹩ compared with KS.