HTML Attribute for <FRAME ...>
BORDERCOLOR =color expression

BORDERCOLOR sets the color of the borders around the frame.

This Code Makes This 
<FRAMESET ROWS="*,*,40%,*,*">
 <FRAME SRC="bcRow1.html">
 <FRAME SRC="bcRow2.html">
 <FRAME SRC="bcRow3.html" BORDERCOLOR=RED>
 <FRAME SRC="bcRow4.html">
 <FRAME SRC="bcRow5.html">
<NOFRAMES>NOFRAMES stuff
</NOFRAMES>
</FRAMESET>
this page

Some versions of MSIE have a bug concerning BORDERCOLOR and can't figure out which borders should be which colors. It's not a harmful bug, but often the colrs won't be arranged the way you expect.

<FRAME MARGINWIDTH="..."> >