one of the documented procedures in this installation of the ACS
ad_partner_default_font   { props "" }
What it does:
Returns an html font tag with the default font face and default font color filled in from the partner database. If props is nonempty, it is simply included in the font statement
Defined in: /web/philip/tcl/ad-partner-defs.tcl

Source code:

    set face [ad_partner_var default_font_face]
    set color  [ad_partner_var default_font_color]
    return [ad_partner_format_font $face $color $props]