F150W − F444W versus F444W color-magnitude distribution for our 3 < z < 4 sample. The markers show the color-selected populations of BlueSFGs, RedSFGs and QGs located above the black solid line defining our RedSFGs selection criteria. As a reference, we indicate the selection criteria for H-dropouts in Wang et al. (2019) (i.e., F150W > 27 mag and F444W < 24 mag) as a green dashed triangular region and the OFG selection from Xiao et al. (2023) (i.e., F150W > 26.5 mag and F444W < 25 mag) as a red dotted line.