Modify the appearance of the header. The STYLE= attribute alters the style element that produces the Head table element. The style element Header is defined in the default style, Styles.Default. Many procedures, including PROC UNIVARIATE, use this style element to produce headers for tables and columns. (For information on viewing a style, see Styles That Are Shipped with SAS Software.) In this case, the STYLE= attribute specifies green for the foreground color and italic for the font style. All other attributes that are included in Header remain in effect. The STYLE= attribute affects only the HTML output.
style=header{color=green fontstyle=italic};