Create internal pages design for existing design

Hi, We have a working site (under development). We currently have a main page, but we need an internal page design (using our current header + footer) - we need the center (body) design. We need you to suggest designs that will look good + elements (examples with comply colors) and then convert it to html elements. As said, we already have the design, so the part that you will need to convert to HTML will be only the main part but it will have to fit into our html. Thanks