@article{Zeileis2009,
author = {Zeileis, A. and Hornik, K. and Murrell, P.},
title= {Escaping RGBland: Selecting colors for statistical graphics},
year = {2009},
doi = {10.1016/j.csda.2008.11.033},
volume = {53},
number = {9},
pages = {3259--3270},
}