Rest-frame UVJ color of the 16 spectroscopically confirmed UMG candidates presented in B. Forrest et al. (2020b) and 12 spectroscopically confirmed S-UMGs candidates presented in B. Forrest et al. (2024b). The RF colors were estimated at the spectroscopic redshift using FAST++ and UV-to-8 μm photometry only. The dashed line denotes the division between “dusty” and “non-dusty” star-forming regions (C. Schreiber et al. 2018b). COS-DR3-195616 lies in the quiescent “wedge,” and COS-DR1-209435 lies in the upper-right dusty star-forming region.