Comparison of submm/mm/radio colors for ASXDF1100.053.1 and 231.1 with colors of known z ≳ 5 SMGs from the literature. Submm/mm/radio colors for ASXDF1100.053.1 and 231.1 are marked by red crosses or arrows based on fluxes in Table 1. The SMGs with the highest known redshift, HFLS3 at z = 6.3 (Riechers et al. 2013), and known z ∼ 5 SMGs, AzTEC1 and AzTEC 3 (Smolčić et al. 2015), are marked by black points. The blue, orange, and green lines mark the color track as a function of redshift of the average SED of 99 ALMA-identified SMGs (Swinbank et al. 2014) and SED templates of Arp 220 and M 82 (Silva et al. 1998), respectively.