Generate the second contour plot. CTEXT=green specifies green for all text on the axes and legend. COUTLINE=gray specifies gray outlining of filled areas. The PATTERN option specifies the fill pattern and colors for the contour levels.

proc gcontour data=swirl;
   plot y*x=z / 
      ctext=green
      coutline=gray
      pattern;
   run;
quit;