Sorry that I wasn't clear about it. I've attached what it is I want to do. Essentially I want to add a section where I can put logos of partners onto my site. Now the footer area is black which clashes with some of the logos hence I wanted to introduce another area which I could make grey.
The reason I was talking about css over modules is that I found there is more information for me to modify css than there is to create a custom module, for example I don't know how to get the module to span across the length of the page or to give it a background colour. I do however know how to do these things in CSS so I was thinking of being able to do this in CSS and just mockup a custom module sticking in the logos and putting it over the newly created area.
If you would be able to suggest a possible implementation for this it would be greatly appreciated.