SED of the OT that followed GRB 140506A. The SED in the v-to-uvw2 filter bands was derived from UVOT data at 24 h post-burst. The one covering the K_s-to-g′ filters is based on ground-based data at 7 d after the GRB. We show fits with no dust (gray dash-dot-dotted line), Milky Way dust (black compact line), Large Magellanic Cloud dust (red dashed line), and Small Magellanic Cloud dust (violet dashed line). The Milky Way dust fit is the best (see text for more details).