The colour of the dark side of the Moon P. Thejll, C. Flynn, H. Gleisner, T. Andersen, A. Ulla, M. O-Petersen, A. Darudi and H. Schwarz A&A, 563 (2014) A38 Published online: 03 March 2014 DOI: 10.1051/0004-6361/201322776