(left) H–H–L′ color–magnitude diagram comparing HD 100546 b to the MLT dwarf sequence from Leggett et al. (2010), imaged planet-mass companions (PMCs), the COND and DUSTY limiting-case planet/brown dwarf atmosphere model loci (Allard et al. 2001; Baraffe et al. 2003), and the loci of colors for accretion-dominated protoplanets (Zhu 2015). PMCs draw from the compilation in Currie et al. (2013) updated to include new ROXs 42Bb photometry (Currie et al. 2014a, 2014c). (right) PSF-subtracted image and model disk rim compared to a simulated, PSF-subtracted disk rim and a rim+point source.