To remove the grid lines from within a table in the RTF destination, specify the style attribute RULES=NONE along with BACKGROUND=_undef_. Use the style attribute FRAME=VOID within the style element Table to remove the borders surrounding the table.

To remove the shading from the column headers and row headers, add the BACKGROUND=_undef_ attribute in the style elements Header and Rowheader, respectively.

   proc template;
     define style styles.test;
       parent=styles.rtf;
       class Table  /
             background=_undef_
             Rules=none
             Frame=void;
       class header , rowheader /
             background=_undef_;
     end;
   run;

   ods rtf body='noshading_nogridlines.rtf' style=styles.test;

   ods noptitle;
   proc freq data=sashelp.class;
     title 'Remove gridlines and row/header shading from RTF tables';
   run;

   ods rtf close;

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Output

noshading_nogridlines.rtf