Pagebackground CSS question

[aceofspades]

Thank you for the reply but thats not quite what im after.

I have applied a CSS to the page background but its affecting everything on top of the page background in the same way. For example, if i made the pagebackground a semi transparent red colour like in the picture, it would make everything on the page semi transparent red too like the forums, but i want to be able to do that to the page background and leave the transparency of the forums, navbar etc untouched

Is this not possible then? Can i not stop the CSS from the page background applying to everything ontop of it like the forums.