The information at
seems to be outdated. In particular I don't think there is a conf/templates folder anymore, and all this kind of thing happens in htdocs/themes.
Does anyone know of a guide for theme customiztion that is current? If you can say that the information on the wiki is accurate, just in the wrong folder, that helps too.
And overruling all of this, is it recommended that I try to stick to using math4 overrides, as in Geoff's post here? http://webworkgoehle.blogspot.com/2014/07/customizing-colors.html