Inferred SEDs of three separate underlying components at the positions of the images of SN Refsdal. Measured flux densities are shown relative to the F160W band. The BCG+ICL are shown as red squares, the early-type galaxy that lenses the SN images S1–S4 are black triangles, and the background flux density that accounts for the SN Refsdal host galaxy are blue circles. All flux densities were measured using GALFIT (Peng et al. 2002) modeling, treating the BCG+ICL as a single Sérsic profile and the elliptical galaxy lens as a separate Sérsic profile. The light from the SN Refsdal host galaxy (the background spiral) is accounted for as a background flux level above the uniform sky brightness. Photometry is corrected for foreground Milky Way extinction using Schlafly & Finkbeiner (2011). Measurement uncertainties are shown but are smaller than the size of the points. See the main text for further details of the fitting procedure.