I understand that I can edit MediaWiki:monobook.css to add in stylesheet type stuff.
Reading the w3 stuff:
http://www.w3.org/TR/CSS21/selector.html#class-html
I see that I can do:
H1.pastoral { color: green } /* H1 elements with class~=pastoral */
<H1>Not green</H1> <H1 class="pastoral">Very green</H1>
However, this does not seem to do anything.
Playing around with my cache doesn't seem to influence anything. Is there another caching mechanism I need to know about? Some sort of maintenance script or something?