Thankyou for all the helpfull comments, and those excellent links from spufi. The color blender looks really cool.I especially like the tip on using a jpg or similar picture to pull colors from to use in my site - excellent idea!
Concerning the HTML validation - I seem to remember that all the pages were validated correctly - the validator seems to have problems with php code in certain places. I had to re-write some pages to get them through the validator.
This homepage is just supposed to be a link to other sections of the site - ideally a portal to several sites all on the same machine. I've tidied up the atrocious colors, so you won't need your sunglasses now - I think I got a bit carried away with the powers of CSS!
This page will evolve as more content is made available on the server.
At the moment, I'm getting my head around the finer points of CSS, then on to the finer points of OOP and design patterns in PHP4.
Regards - Keith Roberts