Panel a: differences between BCs in J, H, and K_s bands inferred from the NextGen models of Allard et al. (2011) with log₁₀(g)=0.5, [M/H]=0.5 dex, and T_eff ranging from 2600 to 4500 K in steps of 100 K; and the BCs inferred from the same set of models, but with [M/H]=0.0 dex. Panel b: differences between BCs inferred from ATLAS9 models with log₁₀(g)=0.5, [M/H]=0.5 dex, and T_eff=3500, 3750, 4000, 4250, and 4500 K; and the BCs inferred from the same set of models, but with [M/H]=0.0 dex. Panel c: differences between BCs inferred from ATLAS9 models with log₁₀(g)=0.5, [M/H]=0.0 dex, and T_eff=3500, 3750, 4000, 4250, 4500 K; and the BCs inferred from the same set of models, but with [M/H]=−0.5 dex. Panel d: similar to Panel (b); this time, the ATLAS9 models are those distributed by Howarth (2011). Dotted horizontal lines are drawn every 0.1 mag for easier visualization.