Client Script - change page and/or section background colours

Client Script - change page and/or section background colours

Hello,
Would anyone be willing to help me with a bit of Client Scripting code? I have had a go myself but only been able to alter the form field styles, not the overall page/section/heading styles.

I want to set a different page background colour for each module, so my users can see at a glance what section of the CRM they're in. We have several custom modules as well as the standard ones and everyone says the pages all look the same and they're never sure where they are!

I know Canvas is an option but the job of recreating every form/page from scratch is way too big a job at this point.

I would also like to know whether it is possible to use client script to alter the sections of a form (ie title and overall  background colour).

Thanks in advance,
Emma