SPIRE color ratios based on different SED libraries. The numbers on the plot indicate the redshifts. The SPIRE color ratios based on the M12 templates are plotted in each panel as a reference (red line with squares). Panels a) template of CE01 with L_IR ~ 10¹¹L_⊙; b) template of DH02 with α = 2.0 (black) and α = 1.5 (blue); c) templates of E11 for MS galaxies (black) and SBs (blue); d) templates of M12 for MS galaxies (red) and SBs (black); e) SF_glx_2 template of B13, which is derived from star-forming galaxies in COSMOS field; f) template of C14.