Composite UV-to-FIR SEDs of the red, blue and green galaxies (the upper two panels) and AGN hosts (the lower two panels). The UV-to-NIR SEDs of galaxies in each population are de-redshifted to rest-frame and normalized to unity at J band (~1.25 μm), then projected onto a common wavelength grid. At each wavelength we derive the median and denote as filled symbols. If more than half of the sample is not detected within a wavelength grid, then we denote the median as open circles. The FIR fluxes from stacking are also normalized at J band. FIR data points for non-detections (S/N < 3) in the stacking are shown with their 3σ upper limits, and are denoted by open circles. For reference, we over-plot a UV-to-FIR SED of a nearby spiral galaxy (a blue galaxy based on our classification), M 51, from the Grasil model (Silva et al. 1998).