Relation between IR and sub-mm colors (with exception of the first panel, which is the color f₆₀/f₁₀₀) and the dust temperature of the cold component (f_λ, λ in μm). This relation is shown only for galaxies with five or more photometric measurements and . The large, red crosses show the mean values of T_cold in different color bins. The blue dashed curves are the best fit lines for all points, while the red dashed curves are the best fit lines for the large red crosses. Symbols represent MS galaxies (squares), SB galaxies (diamonds), PAS galaxies (crosses) and intermediate SB galaxies (triangles). The black horizontal line shows the typical error in the flux ratio.