Add the optional parameter "alpha"to TColor::SetPalette. The default value is 1.   (opaque palette). Any value between 0. and 1 define the level of transparency. O. being fully transparent and 1. fully opaque.


git-svn-id: https://root.cern.ch/svn/root/branches/v5-34-00-patches@48357 27541ba8-7e3a-0410-8455-c3a389f83636