Assign the libref and set the graphics environment. COLORS= specifies a colors list that is used by the default patterns. CTEXT= specifies black for all text. 
libname reflib 'SAS-data-library';
goptions reset=global gunit=pct border cback=white
         colors=(blue green red) ctext=black
         ftitle=swissb ftext=swiss htitle=4 htext=3;