Assign the libref and set the graphics environment. Black is the first color in the colors list and, by default, is used for all text and for the axis lines and frame. Therefore, it is not necessary to use CTEXT= (GOPTIONS statement) and CAXIS= (HBAR statement) to specify a color. 
libname reflib 'SAS-data-library';
goptions reset=global gunit=pct border cback=white
         colors=(black blue green red) ftext=swiss
         ftitle=swissb htitle=6 htext=3.5;