I am not to sure about that because of this part of the layout.

I only know how to code them with solid colors like my site.
The only other thing i think might work is if you use a transparent frame and don't set bg colors for the two pages.
Your frame would be like this
<IFRAME style="filter: chroma (color=#CF9797); left:fill in; position: absolute; top:fill in" border=0 name="watever" src="url" frameBorder=0 width= height= allowtransparency></IFRAME>