Near-IR color temperature vs. NIR-MIR color. Red infrared colors are to the right. The arrows are extinction vectors from our two blackbody model (crosses are at mag). Solid arrow: T_hot = 1500 K, T_warm = 300 K, f_area = 1000. The dotted vectors are for a third (left) and three times (right) f_area. The curled (dash-dotted) vector is with a scattering fraction of 10% (for details see text).