The PROC TEMPLATE statement starts the TEMPLATE procedure. The DEFINE STYLE statement creates a new style definition called newstyle. This STYLE statement defines the style element cellcontents. This style element is composed of the style attributes that appear on the STYLE statement. The FONT_FACE= attribute tells the browser to use the Arial font if it is available, and to look for the Helvetica font if Arial is not available. 
proc template;
   define style newstyle;
      style cellcontents /
         background=blue
         foreground=white
         font_face="arial, helvetica"
         font_weight=medium
         font_style=roman
         font_size=4;